That's simply because there's nothing to discuss.
Then why are you here?
You can continue thinking it's 1953, while the rest of us get by in 2019.
The current year is irrelevant. Either it's good policy or it's not. If you aren't capable of having a frank and forthright discussion on the matter then that's your problem, not mine.
And no, I don't for a minute believe such an effect will be had. Mostly because that kind of guy isn't looking at the RAF in the first place, and even if he was and that advert put him off, I'm fairly confident he's not the kind of person we'd want anyway.
I'll ask you this, if a woman was put off by an advert that didn't specifically cater to her gender, is that the type of person you'd want anyway?