The main reason it exists is the close reasons are standardized across the SE network, including meta. Obviously some of the reasons apply better on some sites than others and I would argue that the primarily opinion based on is less applicable to meta sites than regular ones.
On the other hand, the question you likely saw this vote used on was not only opinion based, but the resulting opinions don't matter for anything. In most cases on meta, the idea is to collect opinions and arrive at some sort of consensus. The question was asking something not only subjective but highly variable and of no consequence either way. The result will not be consensus about the way something on the SE network should be done. That question could perhaps be closed as Off Topic for not having encountered a problem on an SE site or something like that. Or it could just be downvoted and ignored as useless.
While the close reason isn't a perfect match, there are sometimes cases where it is the best match and a question should be closed. On meta I suspect it's a pretty rare question that really calls for closing because it's opinion based. This one for example is opinion based but quite appropriate for meta because the decision matters to the usage/moderation of an SE site.