If you are lucky enough or have worked hard enough to have disposable income, you get to chose how to spend it.
Not every "pro" wants or needs that type of instrument. Making a living from music is ridiculously tough, especially here in LA. The guys I know who don't have a day job have a solid set of gear and that's it. That said, a lot of guys with uprights have spent well over $10K for their instrument so it evidently is worth it to them. Also, if you look at the roster of Fodera players, seems like a lot of pros there think it is worth it (very few of them get comp'd instruments).
I remember a few years back Victor Wooten was on tour in Europe and his basses got temporarily lost. He had to play a show, and Jason from Fodera put out a call on TB to see if there was someone with a Fodera in EU who could loan it to Victor for the show. Some of the TB snarks said things like, "if he's so great he should be able to play on anything..." etc. Truth of the matter is that he can play pretty much anything, but to do what he wants to do, he needs a certain level of performance and capabilities from the instrument. And if you've played a certain type of instrument for a long time, you get used to that. When performing, you want to keep the variables to a minimum so you can play your best.
Should everyone play a Fodera? Nope. Just like everyone shouldn't necessarily play a Fender or a Lull or a Sadowsky. Lot's to choose from, and no single best solution for everyone. Play what you love, love what you play.