Re: Why not just disable the system and put the planes back in the air?
imanidiot, just one caveat there. MCAS doesn't operate when flaps are extended, or A/P disabled, and only works under high thrust, low speed. You'd find that on approach none of these conditions would be met.
When you look at the FDR data from JT610, you will see that the problems started as soon as they retracted flaps to 0.