But from reading some of the postings on here, they will apply, get picked , found not be eligible , get disqualified, complain and someone who is eligible will have lost a spot
yes that is exactly what happens.
But no person has successfully sued the government because they won the lottery got picked, found not be eligible, got disqualifed.
Neither has anyone who has not been picked by lottery and sued government for losing a spot to someone who is not eligible.
Whereas with the FCFS people have successfully sued for not being able to win a spot in the FCFS race by saying they have limitations and disadvantages to being as fast as they can possibly be.
So there you have it. Lottery system as is is here to stay.
Proven track record to make as many people happy and without having government sued.