Do car magazines have women on the front? Gardening?
No.
They have cars and plants on them.
Google "car magazines" of the dozen or so first examples only 1 had any human being- and it had a man and a women.

Gardening magazines have gardens and flowers. A few had inset pictures of people- there were more women than men.
What is your point? Of course a specialist magazine is going to have pictures of its specialist subject on the cover.