This is almost what Samourai was doing, minus the "decentralized" part since all their coinjoin transactions were coming from their own server. But if you have the ability to set up decentralized coinjoins with a reserve of something like 1BTC then it becomes near impossible to track the ins and outs of them all - especially if dozens of people with 1BTC start their own coinjoin coordinators.
This is the point.
There is a lot of talk about maintaining the privacy of money, transactions, etc. But then you try to use centralized services for this purpose. It's almost impossible to keep something private, at least for a long time, when using centralized services. One cannot want privacy and then use centralized services.
Solutions to obtain privacy must be increasingly decentralized, as this is the only way to maintain privacy and avoid these types of situations. Developers, instead of wasting time trying to bring GIFs into the Bitcoin blockchain, should look for decentralized solutions within the blockchain that would improve users' privacy.
In short, you want privacy but use centralized services, it's halfway to losing that privacy.