It bans "raw-milk cheese", which is a distinct kind of product, not one way of many to make a particular product ("cheese"). If you ban raw milk, you ban certain types of product entirely, and there is no workaround.

It would be like saying a prohibition on planes does not ban automobiles, and after all, both are a kind of vehicle. True, but not really relevant.

Back to the GDPR case, it's closer to a producer of pasteurized-milk-cheese saying they are going to get out of the cheese business altogether because of the ban on raw-milk-cheese, and labeling their cheese as such and documenting however briefly that the cheese is made out of pasteurized milk is just too much effort, and they are afraid of being sued by people claiming it is raw-milk-cheese.

Whatever.

If they sell private information gathered from that messenger app to undisclosed third parties, then there may be additional costs of compliance.

Maybe this developer is complaining because he's running a nefarious business model? In that case it might indeed be easiest for him to shut down his business in the EU.

Again cost / benefit is always a valid choice to operate somewhere.

If you cancel an appointment because you stubbed your toe, many people will consider that response unreasonable. If you did it because a pterodactyl flew in and bit off your head, lightning thought process and all, fewer people would.