Bit of an exaggeration but I get your point. A money for the whole world has to work for normies. Bitcoin is made to become that money. Eventually people will get burned or get educated, etc., and switch to better custodial solutions, semi-custodial, and self-custody, all held accountable by the free market. To begin with, banks will start holding Bitcoin for you in the coming couple years (I know, disgusting).

It's going to find its way EVERYWHERE. And most people in this world are extremely ignorant. That's what you get for having the most successful money at being a money. But those coins are still very hard to fake, double spend, etc. It's easy to audit the institutions that custody them. It's easy to set up federations where every family has that one bitcoiner that can set everybody up and manage the technical stuff. The technical and privacy conscious people can protect their privacy within the same unit of account via lightning, ecash, and new technologies built on Bitcoin.

You underestimate the market and free banking to hold multiple competing custodial solutions accountable. But the point remains that Monero users are generally utilizing more of its privacy and self custody features, partly because those are the defaults. It specializes in privacy. It's really good for that.