It gets worse for them. Estradiol, the main human oestrogen, is a metabolite of testosterone. The body makes it by converting testosterone into it. They are very, very similar molecules. The main difference is that testosterone has one carbonyl group and one hydroxyl group, and estradiol replaces that carbonyl with a second hydroxyl.
But anyway: implications for the poor super-straight, “women are a mysterious lovely feminine species” incel types are as follows: all that super feminine oestrogen came from nasty dirty masculine testosterone, and some of their own very male masculine “I love beer and farting” testosterone is routinely converted into sissy emasculating oestrogen (like, if it weren’t, they literally would not have a skeleton).
Oh, and if the idea of dating women with highish testosterone levels freaks them out, then the way to avoid that is to seek out trans women. Most of us post transition have almost none, and our oestrogen is usually produced from plant sources, going nowhere near any testicular-cooties action.
But we won’t sleep with them either. So sad.