The equivalents for Android, precompiled ReVanced APKs, are commonly used to spread malware. Following the instructions to patch the app yourself isn’t hard. Google taking down precompiled modded versions of YouTube but leaving patches and the the tools anybody can use to apply them is a neutral thing at worst.
Also I don’t see anyone in this thread glad that Google did this, aside from the first half of the joke / fakeout / pun post about IPA beer.