If as a technologist you can’t imagine companies making money selling software to happy customers without relying on the brittle trendy framework du jour, my only advice would be to spend less time making silly bets with strangers on internet discussion boards and more time looking at boring profitable companies.
You sincerely believe that devs will just add complexity to their work just because?
They don't care about React or htmx. They just want something that fixes the problem.
This is actually very freeing: meet a real need and you don't have to believe that software development consists on running on a treadmill of constant changes for their own sake. Just do the job competently.
Most of the time it is dictated by the whims of corporate(by making frameworks/tools as part of a job requirement) or by the mob(teams need to collective decide what technology to use).