I really do understand your point of view, where you are saying, Low Houred Cadets must not fly a Commercial Jet...they are not safe...But, bythway ----> Safety is the main reason that the ICAO had made the MPL, so I am pretty sure that such accidents wouldn't occur with a MPL guy...as you will be made aware of such errors while training...
I just had a heavy lunch here...I barely can speak or type...I'm out now