I think the problem is not in the variety of service animals used... it could very well be that animals other than dogs can be service animals. I am intrigued that parrots and monkeys might be very helpful in doing tactile tasks for those with serious mobility issues.
I think the problem is in the increasingly silly list of human conditions and animals that may or may not help them. On the surface, many seem like silly excuses to take their pets with them everywhere. Panic attack monkey?
Yeah, the ‘panic attack monkey’ sounds a little ridiculous, but I’m cool with the ‘calming parrot’ - I casually know a couple people who are bipolar, and I’ve seen them during some bad times, and I’d happily let every bipolar person in the world carry a parrot around in a backpack if that’s what it takes for them to get through the day OK.
I don’t disagree about the thing about the monkeys, though, especially given that they have higher intelligence and longer lifespans than dogs, and that’s not to mention the whole ‘manual dexterity’ thing that dogs just don’t have to begin with.