It's not Google's fault. The 6pt text at the bottom clearly says:
"AI responses may include mistakes. Learn more"
replies(2):
"AI responses may include mistakes. Learn more"
I did inspect element and it's actually 12px (or 9pt). For context the rest of the text (non-header) is 18px. That seems fine to me? It's small to be unobtrusive, but not exactly invisible either.
Especially in an area you own, like your own website or property.
Want to dump toxic waste in your backyard? Just put up a sign so your neighbors know, then if they stick around it's on them, really, no right to complain.
Want to brake-check the person behind you on the highway? Bumper sticker that says "this vehicle may stop unexpectedly". Wow, just like that you're legally off the hook!
Want to hack someone's computer and steal all their files? Just put a disclaimer on the bottom of your website letting them know that by visiting the site they've given you permission to do so.
Stop strawmanning. Just because I support google AI answers with a disclaimer, doesn't mean I think a disclaimer is a carte blanche to do literally anything.
Considering the extent to which people have very strong opinions about "their" side in the conflict, to the point of committing violent acts especially when feeling betrayed, I don't think spreading this particular piece of disinformation is any less potentially dangerous than the things I listed.