Not an MCAS Fault
Again if you look at the trace of the left AoA Sensor, it all starts going 'pear-shaped' 3 minutes before the take-off roll.
You can notice the right AoA stays at a constant value, but the Left AoA starts to Drift, during the taxi run. Electrically such a drift can be caused by loose signal wires, or faulty digital logic chips.
Blaming the accident on MCAS is as much incorrect, as blaming it upon the elevator or stabiliser.. All of which operated normally.