You’re being reductive. Just because a trans woman and a cis woman have different needs doesn’t mean that a trans woman and a cis man have the same needs. Similar with pre-op vs post-op, and trans vs intersex. You know who generally handles those intricacies? Your doctor. Walgreens generally isn’t handing out prescriptions. They don’t need your medical chart, that’s for your doctor to deal with. It’s especially not needed for a flu shot like OP got.

Take bloodwork as an example. I’m a trans woman. Shitty endocrinologists send in my blood work order as male, but when my levels are compared to typical male ranges, literally everything is a red flag. It’s useless. When compared to female ranges however , a red flag indicates that there’s actually a problem. As another example, cis men have never had to go to a gynecologist.

Pregnancy can have some pretty serious interactions with certain drugs, both of which are quite common, which is why it stands out.