Repetition is not a character test
Accept that useful practice can still be tedious.
“Muscle memory” is a convenient name for a movement becoming familiar enough that it needs less conscious control. The muscles do not remember on their own; your nervous system becomes better at organising the movement.
Why one good repetition is not enough
A correct attempt proves that you can perform the movement. Repetition makes that particular solution easier to find again. For a drummer it might be a sticking or foot pattern. For another musician it could be a fingering, chord change, bow movement or articulation.
Unfortunately, the point where you understand a movement often arrives well before the point where you can perform it reliably. The remaining work is not intellectually difficult. You know what to do. You simply need more correct repetitions than your brain finds interesting.