Pryを日本語入力を可能にしたいけど...

Question

環境

macOS 10.15.5
Rails 5.2.4.2
Docker 19.03.12

前提・実現したいこと

RailsのConsoleでPryを使用していますがこれを日本語入力を可能にしたいです。
しかしエラーになり思うように行きません...

作業手順

$ rbenv version
2.5.8 (set by /Users/Chisaki/Allies/.ruby-version)
$ rbenv uninstall 2.5.8
$ brew install readline
Updating Homebrew...
Warning: readline 8.0.4 is already installed and up-to-date
To reinstall 8.0.4, run `brew reinstall readline`
$ brew reinstall readline

上記のようにrbenvをreinstallしました。

参照リンク
[Ruby] pryやirbで日本語入力を可能にする

発生している問題・エラーメッセージ

reinstallをしている中たくさんの羅列の中の一部を下記に記載しました。

(省略)

Error: The `brew link` step did not complete successfully
The formula built, but is not symlinked into /usr/local
Could not symlink bin/2to3
Target /usr/local/bin/2to3
already exists. You may want to remove it:
  rm '/usr/local/bin/2to3'

(省略)

Error: The `brew link` step did not complete successfully
The formula built, but is not symlinked into /usr/local
Could not symlink bin/aws
Target /usr/local/bin/aws
already exists. You may want to remove it:
  rm '/usr/local/bin/aws'

(省略)

そして最後に...

Warning: Refusing to link macOS provided/shadowed software: readline
For compilers to find readline you may need to set:
  export LDFLAGS="-L/usr/local/opt/readline/lib"
  export CPPFLAGS="-I/usr/local/opt/readline/include"

For pkg-config to find readline you may need to set:
  export PKG_CONFIG_PATH="/usr/local/opt/readline/lib/pkgconfig"

試したこと

下記のコマンドを実行して

$ brew info readline

readline: stable 8.0.4 (bottled) [keg-only]
Library for command-line editing
https://tiswww.case.edu/php/chet/readline/rltop.html
/usr/local/Cellar/readline/8.0.4 (49 files, 1.5MB)
  Poured from bottle on 2020-10-10 at 00:10:41
From: https://github.com/Homebrew/homebrew-core/blob/HEAD/Formula/readline.rb
License: GPL-3.0
==> Caveats
readline is keg-only, which means it was not symlinked into /usr/local,
because macOS provides BSD libedit.

For compilers to find readline you may need to set:
  export LDFLAGS="-L/usr/local/opt/readline/lib"
  export CPPFLAGS="-I/usr/local/opt/readline/include"

For pkg-config to find readline you may need to set:
  export PKG_CONFIG_PATH="/usr/local/opt/readline/lib/pkgconfig"

==> Analytics
install: 390,062 (30 days), 1,318,202 (90 days), 5,378,731 (365 days)
install-on-request: 15,274 (30 days), 53,516 (90 days), 403,477 (365 days)
build-error: 0 (30 days)

バージョンを確認して下記を実行しました。

$ brew switch readline 8.0.4
Cleaning /usr/local/Cellar/readline/8.0.4
Opt link created for /usr/local/Cellar/readline/8.0.4
ChisakinoMacBook-Pro:Allies Chisaki$ brew link readline --force
Warning: Refusing to link macOS provided/shadowed software: readline
For compilers to find readline you may need to set:
  export LDFLAGS="-L/usr/local/opt/readline/lib"
  export CPPFLAGS="-I/usr/local/opt/readline/include"

For pkg-config to find readline you may need to set:
  export PKG_CONFIG_PATH="/usr/local/opt/readline/lib/pkgconfig"

しかしエラー内容は変わりませんでした...

参照リンク
MacにおけるRails開発環境におけるreadlineライブラリのバージョン不整合問題への対処

エラーの内容が変わらないので原因がまだわからないというのが正直なところです...。
ぜひこちらのエラー内容についてぜひご教授して頂けないでしょうか。

補足

情報の補足をします。
現在設定されている環境変数はこちらになります。

$ printenv
LDFLAGS=-L/usr/local/opt/readline/lib
TERM_PROGRAM=vscode
PYENV_ROOT=/Users/Chisaki/.pyenv
TERM=xterm-256color
SHELL=/bin/bash
CPPFLAGS=-I/usr/local/opt/readline/include
TMPDIR=/var/folders/gc/vr22f7_j1415c1965h9m48500000gn/T/
CONDA_SHLVL=0
TERM_PROGRAM_VERSION=1.35.0
USER=Chisaki
CONDA_EXE=/opt/anaconda3/bin/conda
SSH_AUTH_SOCK=/private/tmp/com.apple.launchd.T62aYPg5jH/Listeners
__CF_USER_TEXT_ENCODING=0x1F5:0x1:0xE
_CE_CONDA=
PATH=/Users/Chisaki/.rbenv/shims:/Users/Chisaki/.rbenv/shims:/usr/local/bin:/Users/Chisaki/.pyenv/shims:/Users/Chisaki/.pyenv/bin:/Library/Frameworks/Python.framework/Versions/3.7/bin:/Library/Frameworks/Python.framework/Versions/3.8/bin:/Library/Frameworks/Python.framework/Versions/3.8/bin:/Users/Chisaki/.pyenv/shims:/Library/Frameworks/Python.framework/Versions/3.8/bin:/Library/Frameworks/Python.framework/Versions/3.8/bin:/usr/local/bin:/Users/Chisaki/.local/bin:/usr/local/bin:/usr/local/opt/mysql@5.6/bin:/Users/Chisaki/.rbenv/shims:/usr/local/opt/mysql@5.6/bin:/usr/local/opt/mysql@5.6/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/Applications/Postgres.app/Contents/Versions/latest/bin:/Users/Chisaki/.rbenv/shims:/opt/anaconda3/condabin:/Users/Chisaki/.pyenv/shims:/Users/Chisaki/.pyenv/bin:/Library/Frameworks/Python.framework/Versions/3.7/bin:/Library/Frameworks/Python.framework/Versions/3.8/bin:/Users/Chisaki/.local/bin:/usr/local/opt/mysql@5.6/bin
PWD=/Users/Chisaki/Allies
LANG=ja_JP.UTF-8
XPC_FLAGS=0x0
RBENV_SHELL=bash
_CE_M=
XPC_SERVICE_NAME=0
SHLVL=2
PYENV_SHELL=bash
HOME=/Users/Chisaki
CONDA_PYTHON_EXE=/opt/anaconda3/bin/python
LOGNAME=Chisaki
PKG_CONFIG_PATH=/usr/local/opt/readline/lib/pkgconfig
_=/usr/bin/printenv

ちなみにエラーの表記にあった環境変数をそのまま実行しましたがダメでした...

$ export LDFLAGS="-L/usr/local/opt/readline/lib"
$ export CPPFLAGS="-I/usr/local/opt/readline/include"
$ export PKG_CONFIG_PATH="/usr/local/opt/readline/lib/pkgconfig"