At some point comparing human chess to algorithms stopped making any sense. So there is no realistic pool of games between AI and humans. We would lose every game and vs AI a human ELO would go to 0 (not sure if that is technically possible). It is like this for probably 15 years.

ELO is like probability. A 100 ELO difference is something like 2x odds of winning a game and over a lot of tries it tends to be quite accurate. That was also an argument from Magnus Carlsen that to compare human ELO you need a lot of games and he didn't want to take part in classical world championship quoting this reason (among others).