[mtgex]

Yeah, the article addresses this question pretty clearly.

Even things that "feel" obvious to us should be studied. We shouldn't just take it for fact that an emotional support animal is a valid method of coping with depression or anxiety.

Especially when there are alternatives which have gone through and continue to be subjected to rigorous scientific study.

If an animal helps you cope with these things, yes by all means go for it. But you can't state that it is a valid alternative to things like medication or therapy if you've never tried them. This person may well be depriving him/herself of an even healthier life which, incidentally makes their pet's life healthier and happier as a result.