Nope, no damn way first come first served in my rentals.
What you’re going to see is a whole lot of underground services popping up that will have potential pre-screened good renters signed up before the listing takes place. Then select landlords willing to give a little kickback will contact them announcing the availability before it even gets listed a backroom deal can be made before it’s announced. That way first come, first served by date and timestamp will be upheld if questioned by some ditch digging loser who wants to rent a McMansion with his section 8 allowance.
Yes, you're right. This is what happens in hiring practices to skirt fair hiring. Management will have pre-selected people lined up for a job, quickly open it and shut the door, only allowing the pre-selected people to "interview" and be hired. Why shouldn't the same happen in rentals? Backroom deals will be the norm, to allow a "first-come, first served" pre-selected renter in. Seattle is nuts.
They’ll just sue the landlords based on outcomes (as the government did with Wall Street firms with women under-represented at the highest levels); there was no proof of discrimination, just an unequal outcome that had to be punished with steep fines and a bunch of high-paying fake jobs for women...