If they can perch on a good firm platform, then the sitbones will keep your soft parts up and prevent them from mashing down onto the saddle. The sitbones will take the pressure, not your soft parts.
So THAT"S how it works!

(not meaning to hijack...working out my own saddle issues...)

I noticed that my B67 does exactly what you describe...IF my seat is lower ...if I raise my post so my leg gets proper extension, I feel more pressure...
I probably need to raise my handlebars/ or trade them out/ I have no idea how to raise them on the bike I have....