No, then they are all not like this. They don't want dogs with those problems. Just many of them do. You're obviously not very educated on the subject and pull stuff from animal activist sites.
I studied vet med before I moved on to medicine for humans. But you don't even have to take my word for it, ask any licensed veterinarian about the health problems related to brachycephaly.
And frankly they are sought after, these people are making hundreds of thousands of dollars by selling the dogs semen. You don't even have to do more than very basic searches on social media for that, look at all the comments from people saying "Interested" and "How much?" Then check their profiles to see that they own the same breeds.
You can do the most rudimentary research on this yourself to find out where you're wrong, but you've made up your own mind already.
Anyway I was researching some of the newer cat breeds out in the world, and ran across the Lykoi. I'd seen it before but never looked much further into its genetic background.

They're distinct for their "werewolf" look, which mostly comes from naturally occuring bald patches and sparse fur pattern. Honestly I think they look like they've got mange or scabies, but whatever.
Found out they're very prone to severe skin issues, apparently caused by the same mutation that causes their fur pattern. From the small amounts of research that's been done, the leading theory is that they not only have far fewer hair follicles but smaller pores, which is what leads to cysts forming all over their bodies.
These cysts are directly connected the mutation that causes the Lykoi's partial hairlessness, so it's not tied to any other hairless breed. There have been ongoing efforts to breed away from the "few hair follicle, small pore = cat full of cysts" trait, but it also breeds out what makes Lykoi distinct in the first place, so it seems a bit fruitless.