Who is WSL for?
https://docs.microsoft.com/ja-jp/windows/wsl/faq#who-is-wsl-for

This is primarily a tool for developers -- especially web developers
and those who work on or with open source projects.
This allows those who want/need to use Bash, common Linux tools (sed, awk, etc.)
and many Linux-first tools (Ruby, Python, etc.) to use their toolchain on Windows.