I would wait until after they attempt to bring Starliner back before complaining and blaming NASA. If it makes it back safely, Boeing people can make the claim that it would have been fine with the astronauts on board. If it doesn’t, we’ll then the Boeing people should be thanking NASA for not letting them try with people on board.
My son is an aerospace engineer who says that the likelihood of the Starliner burning up on reentry is about 1% but that is too high to take a risk with humans.