Why doesn't this extend one step further? Many of those "service provider" people no longer are needed? If you're a consultant for domain X, and you used to work at Big Consulting, and they fire you to replace you with AI... soon the customer will hire neither your new provider, or Big Consulting, and just use AI directly, if it's that good.
Certain professions have legal/regulatory protections, but thesis (a) "entrepreneurs replace big incumbent service providers" doesn't seem necessarily more stable compared to thesis (b) "the people who need the knowledge have their AI do it themselves". In order for (a) to be true without (b), the AI tools themselves have to be good enough to make the concentration of specialized knowledge and institutional expertise/history no longer critical; but not good enough that the would-be-entreprenurial-middleman's own specialized knowledge can't also be replaced.