Logically applies to the small dogs too - they're still going to die, and they're only here because of our preferences. It's about where you, personally, want to draw that line, and different people have different thresholds.
(Rabbits and fancy goldfish have similar "live pretty, die young" problems. Probably a whole host of other animals - anything we've bred for shortened heads is likely to have breathing problems - including the Chihuahua).
Selecting breeding is what made dogs into creatures useful for people somehow, whether for working (herding etc) or as pets. Without breeding, you just get wild animals unsuited for human companionship.
However, I still agree with you: I think selective breeding of dogs is wrong. If they don't make good companion animals as they are naturally, then maybe people shouldn't try to turn them into such animals.
(Rabbits and fancy goldfish have similar "live pretty, die young" problems. Probably a whole host of other animals - anything we've bred for shortened heads is likely to have breathing problems - including the Chihuahua).