It is like giving up a lottery ticket you have won for another lottery ticket.
Also, the law mandates certain compliance steps which the employers do. There is no expectation that they should actually hire someone else unless the compliance steps are violated. So everything is working exactly as intended.
This PERM process and law has harmed countless american citizens and employers both. Citizens end up applying for jobs they are not going to get and HR wastes time on resources over candidates they are not going to hire.
A better solution would be to hand a greencard to any immigrant who has worked for 5 years and has earned a certain high salary as proven by the W2.
This whole circus can be gotten rid off if you ask me.