Unfortunately, things like that are allowed now. That's why there's no "nonsense" report option for opinions anymore. Apparently, the admins say even if an opinion is irrelevant to the question being asked, it is still that person's "opinion" so it shouldn't be removed.
Personally, I feel like pointless comments unrelated to the question shouldn't be allowed but, it's not my site. I don't make the rules so it is what it is I suppose.