It never will be. Thats the problem with the system: it inherently results in two poles.
We'd have real meaningful change if all the holier than thou third party voters would become hyper engaged within the party nearest to their alignment. Take it over. Got a taste of it with some progressives but most of them turned out to be performance artists all the same.
Huge CEX have huge liquidity. Probably why Binance got hit with failure to follow antimony laundering practices.
Now, parking stuff there? Maybe ease. People are lazy and most are ill informed. Plus, CEX tend to offer other services such as staking or other ways to earn yield.
Yeah you could go to a DEX. but there's a lot of risk there. A lot in CEX too but I get why some might trust them more than fly by night DEX that are one bridge attack away from insolvency.