I think part of whywhywhywhy's point was that many (though likely not all) of the negative externalities of meat consumption could be fixed by taxing them and raising the price of the burger, without outright banning it
Right, and if that's what they meant, I honestly don't think it's that bad of an idea. One of the objections here is that it shouldn't be a luxury for the rich which, well fine, channel it all through a redistributive system then.
Though I suspect cheap lab grown meat (absent some reactionary political backlash like we've seen in Florida) can make it cheap and accessible to everyone and possibly bypass the concerns about antibiotics.