The site where 'Is this an appropriate question to ask' is on-topic is meta; but on meta.ux the minimum reputation to ask a question is 5. Compared to that, it seems silly that the main ux site allows posting at reputation 1... it causes situations like this question.
I remember reading somewhere — don't remember where, at the moment — that the team chose five to ward off posts from people who weren't even remotely members of the community. In other words, spammers, people who are horribly lost and newbies who haven't yet learned the difference between meta sites and main site.
People will always occasionally post questions to the wrong place, as was done in the example you cited, but that sort of thing is really quite rare, so I'd say the system works (or at least isn't broken enough to justify a fix).