I didn't say they weren't welcome. They are very welcome. We have LEOs who shoot with us all the time and are at the top of the ranks.
One reason folks don't come back - esp. males, is that they may have thought they were intuitive and cracker jack shots and find out they are not. It takes a bit of ego strength to say I'm not so good and I want to learn.
One problem when the naive male brings the naive female is that the naive male doesn't look good and then tells the naive female that the game is ...
Also, when skilled folks (very nicely) try to tell the female something, the so called dominant male bristles at the territorial violation.
We are a very supportive group with no range tyrants or blusterers.