Some of this is just silly. You would think women have dominated riding for 2000+ years...how do folks think all those cavalry riders and cowboys reproduced?
1 - Riding 'on the pockets' is what a western saddle is designed for. It tends to go along with a mild chair seat - not like riding a Harley, but with the feet forward of the belt buckle. It is not wrong. If you look at photos and illustrations from the 1800s, darn near EVERYONE rode with a bit of a chair seat. Some more than a bit.
Apart from dressage, I don't think I've seen more than a couple of photos from before 1950 that showed anyone riding with the 'shoulder-hip-heel' thing.
Think about it girls - have any of your boyfriends ever complained, "I can't sit in a chair, it will crush my balls"?
Most of us have CHAIRS in our homes instead of POLES that we straddle with our heels aligned to our hips. Maybe there is a reason for this? If you don't like company, remove your chairs and install poles for straddling. You won't have many repeat visitors...
2 - Thighs. Most people have them. Use them. Weight can be carried in the thighs as well as the seat. I'm not saying to squeeze with the thighs, but your resting thigh can support weight, just as it does when you are sitting in a chair.
When you post, do you stand up in the stirrups? Well, maybe some do...I've seen it. But for me, posting is more a rolling motion. The horse's thrust rolls me on my thighs to a more forward position, then I let my thighs support some of my weight as I come back down.
For a guy, weight on the thighs is weight that can't smack the family jewels. The thighs form a pocket, just as they do when a guy sits down in a chair...
With a forward seat, more weight is supported by the thighs than the pockets.
3 - Stirrups. Great invention. It isn't wrong or immoral to have weight in the stirrups. It is good to practice without stirrups so you will automatically keep your balance if you lose a stirrup, but there is nothing wrong with pressure on the stirrup. Stirrups are not just an aid for mounting the horse. Weight flowing freely into your heels, which are then supported by the stirrup and your foot, is weight that is not supported by the crotch. It is good to ride without stirrups, but stirrups are attached to a saddle for a reason.
Georgia sheriff, early 1900s:
Learning to ride? 1920: