Everyone is entitled to their opinion, but that doesn't mean unfounded opinion has to be respected or borne just because.
Too many things people say are "just because I think so" without much thinking going into why or how they came to that conclusion. So, maybe calling out baselessly opinionated people is ok?
As an aside, seems like the response was in the same tone as the parent's comment.
I read it as: "your opinion is wrong because you don't seem to have the requisite experience".
And, in such cases, I don't think people can be allowed hide behind the "right to an opinion". If you think about it, this is the source of "alternate facts".
Too many things people say are "just because I think so" without much thinking going into why or how they came to that conclusion. So, maybe calling out baselessly opinionated people is ok?
As an aside, seems like the response was in the same tone as the parent's comment.