You are incorrect.
Bitcoin Core has allowed extra data in transactions deliberately for many years. This tool of mine does exactly that to publish text, and was created prior to even segwit, let alone taproot: https://github.com/petertodd/python-bitcoinlib/blob/master/examples/publish-text.py
Bitcoin Core has allowed extra data in transactions deliberately for many years
Sounds like a mistake I'd like to fix
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If you want to "fix" that you should at least propose a technical solution that isn't just a dumb cat-and-mouse game.
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But I don't have a technical solution
I can state my opposition and my reasons for it but persuasion is about all I can try to do right now because I don't know if it's even possible to fix it technically
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