mypy --install-types Usability Issue

[12rambau]

Bug Report

When no .mypy_cache folder exists and a user runs mypy --install-types --non-interactive ./, mypy may fail on fundamental Python issues but suggest that the failure was because of "no mypy cache directory," confusing the user.

To Reproduce

follow the instructions from this repository (thatactually saved me from countless hours of search): https://github.com/tk-woven/mypy-install-types-mre

Expected Behavior

Get a meaningful error (in my case the folder argument was not existing)

[hauntsaninja]

Duplicate of #10863 / #10768