I am with you OP.. it is deeply offensive. and by checking your pronouns, they are then imposing stereotypes upon you, implying that if you do not opt out of femaleness, you must therefore choose femaleness, along with the stereotypes and oppression.
Why should people offend everyone by asking their pronouns while attempting to avoid offending the very small minority of people who seek to strengthen stereotypes and impose them on everyone, making assumptions about people based on biology and not identifying with identity politics.
So @orangeleavesinautumn .. tell me - what do you say to them? I need a good response to have in my arsenal .
All of the responses who say. 'if you have short hair and dress in 'men's' clothes, no one will know', 'They’re probably trying not to offend you OP.', 'your 'look' is very much favoured by the they / them brigade. And god help us if we misgender them.' ..... the vast majority of people do not have a separate gender identity and for millions of years, people have been able to figure out, for the most part, which humans have 'she' pronouns and which have 'he'. Non binary and trans people will tell you soon enough, if you wait...
Please don't offend and harm the majority of us to save the feelings of a few, when there are other ways of figuring out the pronouns of those who choose ones that are different from their sex.
We should not choose a blanket approach because we might save a few people from a perceived harm, while at the same time, doing the same harm that we are seeking to prevent, to a much greater number of people.