How does 2FA prevent this here?

If they required 2FA every time you wanted to modify JS then it couldn't propagate automatically. Just requiring 2FA when you first log in wouldn't help, of course.

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j45 3 hours ago | parent [-]

2FAs also may require a level of KYC that Wikipedia isn't after and advocating for 2FA might indirectly advocate for a lot more things than just 2FA.

	▲	dns_snek 32 minutes ago \| parent [-]
		KYC? I'm talking about standard 2FA methods like Time-based OTP codes.