procedures will be patented and they will be insanely expensive then the countries owning the patent will co-opt the vegans' agenda to make eating meat illegal all over the world unless it's lab meat
That's not how IP laws work..... First, were assuming something is going to be "insanely expensive", which doesn't exactly make sense when talking about food. If you invent a product that has that high of a production cost, no one is going to buy it.
Second, you are assuming that there is only one way to produce lab meats, or that one corporation is going to patent every single possible way to create lab meat. Patenting a process is a lot harder to enforce than patenting an end product, just slightly changing the process would be enough to invalidate most procedural patents.
Lastly, by what means would a corporation make meat eating illegal? We don't have a world government, we cant even prevent the mass slaughter of humans, let alone animals.