Read what I wrote again. It's about payment for order flow. The hundreds of millions of dollars they are paying to brokers.
A seat on the NYSE isn't even a significant fraction of what Citadel pays for order flow.
The rest of your argument seems to degenerate into "well other people have paid for special market position before, so it's good that middle men are getting in between". That's not even really an argument.
WTF do you care at retail? You should be thanking your god for PFOF.
