I'm not sure what your point is. Do you mean that if only people used DAOs then Parse shutting down wouldn't be a problem? It only encapsulates the problem. You still need to go through a process to switch from Parse to MariaDB or whatever else you switch to. You just don't have to rewrite your whole application.

I'm in favor of DAOs and use them myself but they don't have anything to do with what I was talking about.