> Things which look effective on the surface, but has real UX problems in the underneath, are getting prioritised because someone in the room can talk better and enrol a leader to align with the idea

This has always existed. The ability to rapidly prototype has not changed it in any way.

An extremely experienced UX researcher once told me that, having been doing field research and user research for 3 decades now, every time it's a Fortune 500 company, after presenting mountains of research, it comes down to what color the CEO liked in the moment.

I don't understand the proclivity to latch onto whatever the new thing is and blame it for shitty decision-making that has existed as long as humans have existed.