And how would that be in this case?
I actually fail to see how you can respectfully tell someone you think they should swap roles and be sexist. Sure, if your whole argument is that "XXX isn't coming of agressive enough to survive in this boys game" then you might be accused of sexism...for some reason
The fear of a hypothetical "someone" taking something "totally reasonable" out of context is, in my experience, held mainly by people who have a private definition of "totally reasonable" not held by the majority and who'd like to continue holding it without consequences.