I once watched a talk by someone running a startup creating artificial cheese and it sounded like the FDA was very interested in what they're doing and they hat

I once watched a talk by someone running a startup creating artificial cheese and it sounded like the FDA was very interested in what they're doing and they hat a close look on the safety. You can expect that this stuff won't go into supermarkets without some testing. The comparison to smoking is a poor one, because this was in another era with a lot less developed scientific methods. The comparison to medicine is closer, but you're looking more to something like testing generics. If you have lab-grown meat that's chemically almost identical then the concerns are much smaller.