Neonchameleon
Legend
It seems to me this can aggrieve GMs in a couple of ways. First, it's more work. Period. The GM has to specifically plan and insert spotlight scene frames into the game. Second, even if the GM is okay doing the work, forced spotlight scene framing is antithetical to the simulationist agenda. You don't just insert a scene somewhere because Bob or Judy needs his or her spotlight time for their combat-deficient rogue. This simply isn't done in simulationism, which by nature demands that spotlight time arises organically.
It's also not done by anyone with a seriously gamist agenda because player skill and the thrill of overcoming challenges is seriously undermined by both having to hold back and by the realisation that the GM pandered to them and rigged the challenges. Finally it doesn't really work at all with narrativism because "Story Now" doesn't mean "The GM writes the story and we play through it" which is essentially what the GM specifically spotlighting characters in scene framing does. It means "We all contribute to the story."
Which is of course one of the many weaknesses of GNS. All three creative agendas it identifies are against the forced scene framing, and people are still fine with it.