I have been to Bitcoin conferences and I would say this is not true - the conferences are great even for people not working with Bitcoin. There is just a lot of fun, a lot of things to try, interesting folks to listen to, and chat with in person...
I have never been to Miami, so I thought about going to that conference this year but it was either that or go to Texas and hang out with family. I would also consider going to the Pacific Bitcoin Conference since they are moving it to September. My wife has family in the area and I want to check out dodger stadium. Been to LA many times but never lined up with when dodgers were in season or in town.