It’s one thing to work out something in a practice room and another to actually try it in front of others.
We need performance opportunities that can be used test out these ideas, to try things with some sort of safety net that would save us from disaster on stage. This could take the guise of a studio class or playing a tune for a fellow musician or your grandmother.
Scientists need experiments to test their hypotheses. If they just assumed that their theories worked and immediately put them into practice on, say, a rocket ship, it could spell catastrophe. That is why experiments come in handy, sometimes disproving what they initially thought.
Perhaps we need to be more like scientists and give ourselves more opportunities for experimentation.