This is part of a much larger plan. Google wants to establish a new standard that the rest of the internet will follow.
If Google is seen fighting an endless war against ad blockers, it will encourage other websites to do the same.
No longer will it be “Please disable your ad blocker, as advertising supports us and helps keep this content free”
It will start being “Ad blockers are not permitted.”
Google wants the Internet to start thinking of allowing ads as requirement for entry, and (via Manifest v3 and web environment integrity checking (which you better believe will be brought back in another form)), they will provide websites the tools to enforce this.