No one is saying that men aren't also victims of the patriarchy in exactly the way your outlined, just that they don't get sexualized in the way women do.
To be honest, I don't even know what it would look like for men to be sexualized in this way. Why don't women sexualize men in this way, and what would it look like if they did? There are plenty of heterosexual female artists and writers, so why aren't they interested in sexualizing men this way?
They do, it is just in writing or yaoi or something. Judging from my female friends it tends to be smut, some sort of gay manga, or creating characters that they mod to have sex with each other in a mmo or something like that.
I think you likely haven't looked super hard then. For one example, Fifty Shades of Grey broke into the mainstream and got a trilogy of movies. With a little more searching, you start running into the erotica subgenre of novels, which includes such gems as seen below.
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u/stanleysladybird 13h ago
No one is saying that men aren't also victims of the patriarchy in exactly the way your outlined, just that they don't get sexualized in the way women do.