The current game engine is not made for that. They would have to fully rewrite it.
It would be technically difficult I imagine that. But one can dream.
And current Buzzerbeater way of life is not to force people to be there at one point in time to succeed
That's why I wrote that it could only happen with one game type, like pick-up games, that has a "self-coached" option. Or have a challenge feature, so one could decline the option to have a game be "self-coached" and have a regular game instead. So there would be no competitive advantage.