I genuinely don’t get the “don’t pre order just buy the day it releases” thing.

Nobody ever said the second part.

Don’t pre order, wait for reviews a couple weeks after release, buy if reviews are good and no major bullshit is discovered.

What do you think you’re winning?

Avoiding the major bullshit.

Also, even if you did just buy day one: If developers have a lot of pre orders they know they’ll sell anyway they have less of an incentive to deliver the highest possible quality.