I'll have to take your word that humans aren't as tasty as pigs or cows. But coming from somewhere where horses and whales are regularly eaten I can assure you

I'll have to take your word that humans aren't as tasty as pigs or cows. But coming from somewhere where horses and whales are regularly eaten I can assure you that if you're used to the taste and live in a culture that knows how to prepare those meats that you'd definitely prefer them any many instances. What diet people prefer has a lot of inertia. If you presented say a Briton in the 1850s with spicy Indian food they wouldn't like it in anything like the numbers their descendants do today. Food's an acquired taste, and takes a while to take hold. So you can't just say try gazelle and declare "meh". Which goes to the point I'm making. I don't think that in the year 3000 when lab-grown meat is perfect (can grow muscle fiber, bone, fat etc.) and indistinguishable from the "real" thing nobody will order up pork or beef. Rather, there's going to be the same growth in different sorts of products at the expense of the absolute market share of any one incumbent as we see in beer, soft drinks cookies etc. for the past decades. Now that by-and-large doesn't happen with meats because raising live animals presents you with all sorts of scalability and production limitations.