[situationista]

If it were safe to fly the Max in the US, and the problem were the pilots, it would be in the air now. It isn't, as the problem is clearly with the plane. It was likely just a matter of time before another Max fell out of the sky somewhere in the US, Europe or elsewhere.

[privateSFacct]

The problems were a chain -> starting with terrible maintenance not pilots.

And part 121 planes in the US do not fly multiple legs with the problems described on these planes.

I know it's partly a labor issue, but mechanics at united will take a plane out of service for practically any reason.