Seriously:
„sudoers.local“ has been a thing since about 2005: https://www.sudo.ws/repos/sudo/rev/1dfc2e8c9f2b?revcount=120
„sudoers.d“ got added some time in 2010 or earlier: https://github.com/sudo-project/sudo/blob/79875c3f2b7722e243dbba7d5b037a155d70cdfb/sudoers
The way you configure sudo, your config can get clobbered by updates on any OS.
We all make mistakes and we learn. However, bitching and moaning about some other OS and blaming it for something that is obviously your own fault makes you look like a zealot and possibly a fool.