[gamblor956]

Why not?

For the same reason you wouldn't take technical advice about how to structure a scalable backend from the guy who mows your lawn.

I've listened to a lot of really idiotic theories by lawyers

Lawyers can, and will, say a lot of stupid things, because lawyers are very opinionated people and like to argue. It's why many of us became lawyers. But when we have a client the things we say and do with respect to that client's case are made on a professional basis (i.e., with at least some support from the facts, law, cases, etc.).