I keep thinking that a boutique leather jacket may be way more expensive than a Schott, finer material, better fit, etc., but if your bike goes down, you want the Schott everytime. I can't disagree about anything you've said about boutique basses, except they do not seem to be the tools that most professional bassists use. Why not? (I'm honestly asking why not, because I'd like to know)
I think it depends on which pros you are talking about. If you are talking studio pros, many do use Jazz or p style boutiques.
Many urban gospel pros lean towards MTDs, Ken Smith, Warriors, and other "coffee table" basses. A ton of fusion or jazz guys love Foderas. On the other hand, guys playing rock in clubs often prefer factory basses. Different strokes is all I can say.
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