I agree that milah is meikar hadin and this is a chumra. I’ve even said that this is not a chumra I’m makpid on (part of it is not even a chumra for the reader; it’s editorial policy not to have to keep deciding who is or isn’t attractive or dressed properly).
Where we disagree is on how to view someone else’s chumra or policy. I think it is small minded and insecure to view someone else’s chumra as an attempt to show superiority. Why can’t you accept that people can be strict for sincere reasons?
As to your other point, a man’s yetzer hora manifests itself differently than a woman’s.
And I never said I believe there’s an issur here, just a sincere geder to avoid arayos.
This geder, BTW, I guess (haven’t actually spoken to anyone who follows the policy of not looking at pictures), is not really out of fear that someone will see a tiny picture of a properly dressed woman and have hirhurim, it’s to create a mindset not to look at females in order to avoid other situations which are problematic.
What’s not so important for me, though, is to perfectly agree with or even understand why a different group chooses a chumra or policy. It is important to me though, to have an ayin tova, be tolerant, and believe that the motive is sincere.