What he's talking about is that there used to be a 1st person only server in H1Z1(Battle Royale). It was amazing, 1st person only so nobody could abuse 3rd person, there were zombies, night time - it was actually scary and difficult to play.
@SPPOC I also loved to play that mode!
But yeah, if you play H1Z1 now, and you use 1st person only, obviously everyone else will have an unfair advantage over you. And people have unfair advantages because of 3rd person anyway, by choosing the right angle and the right ground to stand on. It's nothing to do with skill, it just comes down to who was there first and can choose the superior position.