I think it will resonate with the target audience. Maybe the audience outside of that demographic just won’t get it? After all, the RAF aren’t really looking for many 45-75 year olds to join.*
* I appreciate the Reserves recruit older airmen/officers, but generally the RAF are looking for younger (18-25?) people to join. I think this kind of ad appeals to them. I can’t imagine your younger generation women getting hung up about all day protection with wings punchlines.