Handy is excellent and cross platform, and really elegant. They've got a direct website here which might be easier to navigate than the Github repo:

https://handy.computer/

In this case it feels like it's a feature that the operating system should be providing or something that could be marked as an accessibility tool, which would allow it to use that API.

The problem from Apples perspective could be that there is a ton of tools that require access to the accessibility API because they want to do stuff that Apple have deemed a security risk and the only way to do it is by abusing the API. Some of these are also because macOS simply lacks certain APIs.

I think Apple overreacting due to previous API misuse by other apps.

To their defense you cannot rollback apps, so if you did install and only an update had this function, you are out of luck