This is sorta misleading. Coinbase absolutely dominates the US market as far as crypto goes, especially large retail accounts. Binance is mostly smaller trading worldwide (guys with $1000 speculating on shitcoins and such), not 5-7 figure US crypto accounts like with Coinbase.
If you mean that I can't a fake a trade with a third party, then yes, that's true - all fake volume has to be done between parties that are in on it. Otherwise the scheme falls apart when the third party tries to withdraw/realise gains/exercise/whatever.
There's a caveat here which is that quite a few spot markets on Binance are zero fee, so someone can theoretically trade with themselves back and forth to pump volume. I think quite a few third party volume trackers stopped tracking those markets and binance also stopped counting those markets for fee tiers for this reason.
From what i know Coinbase has consumers worldwide and they are able to verify gov issued documents from many countries, including as far as Japan, well not anymore, at least since today.. :p