I'm pretty sure I've seen proposals from other people not just from clayboyn. So, that means he's not gatekeeping the proposals. He's only managing the DAO side, in which, is his job in the first place.
Asking him not to be the arbiter of what DAO does is like asking the spokesperson to not speak for the president. That's part of his job. If your idea though is anyone can pass proposal through DAO without anyone checking for it, then it would be a resource waste because I'm pretty sure a lot of people would be passing proposals for their own benefits, which defeats the purpose of the proposals used for the benefits of the most.