Central coordinators were the testing ground and the honeypot to see if this works, they proved the use case, the established he market and the fees you can earn, now coinjoins need to be distributed and the fee market is not centered around 2 companies but plebs willing to provide liquidity based on the market rate for on-chain privacy

I am sure BTCpayserver and Joinmarket can be added to many a front end or wallet to make it easier for people to do mixing bring liquidity to these markets and the fees alone would attract liquidity providers