It's not a strawman argument, though. The question does not follow the pattern:

The straw man fallacy occurs in the following pattern of argument:

• Person 1 asserts proposition X.
• Person 2 argues against a superficially similar proposition Y, falsely, as if an argument against Y were an argument against X.

Now I will quote the post to show that it does not follow the pattern:

So if one of the models was a man in a suit with a lampshade on their head you would have no problem and this would be perfectly normal?

There's no statement that the argument being made is that "it would be fine if the actors were male instead of female". The poster is asking a question, to paraphrase: "is this what you're saying?". This is a common way to phrase this question (even if it is not a good way to phrase it) when asking it honestly, so it would be unfair to assume the worst interpretation.