At the risk of sounding like a landlord bootlicker....everyone thinks they're good pet owners but many people are awful pet owners and allow the dogs to do whatever they want and that can cause a ton of damage to a place, nevermind contstantly fielding calls from other tenants for barking or loud clacking or whatever because the other tenants get annoyed and it's simply not worth it. As you said, availability is super low so you also have your pick of tenants that don't have pets.

My landlord just evicted a tenant after living in the apartment for 3 months cause other tenants were complaining about the dog. The guy had permission and everything before moving in.

I've actually never toured a dog friendly apartment since moving here a decade ago (and I didn't exclude them). I was always looking for older homes, local landlords and the best ones overwhelmingly drew a line at dogs.

And ya. I moved here and in one afternoon had an apartment lined up (after viewing 3 great ones and having our pick). Now, you're lucky to simply get an email back.