If I do that search on Google right now, the top result is the National Pork Board (pork.org): ad-free, pop-up free, waffle-free and with the correct answer in large font at the top of the page. It's in F, but I always stick " C" at the end of temperature queries. In this case that makes the top result foodsafety.gov which is equally if not more authoritative, also ad-, waffle-, and popup- free and with with the answer immediately visible.
Meanwhile the AI overview routinely gives me completely wrong information. There's zero chance I'm going to trust it when a wrong answer can mean I give my family food poisoning.
I agree that there is a gigaton of crap out there, but the quality information sources are still there too. Google's job is to list those at the top and it actually has done so this time, although I'll acknowledge it doesn't always and I've taken to using Kagi in preference for this reason. A crappy AI preview that can't be relied on for anything isn't an acceptable substitute.