But Sniv, you must understand that your experience isn't the only experience, surely.
And also, the point that was being made is pivotal. There is a vast difference between saying no one should have sex with someone they don't want to (ie individual choice), and you can legitimately discriminate against an entire sex, because of your orientation.
TRAs will always point out that you don't have to have sex with anyone, because it's a personal preference. But they take great umbrage at people dismissing an entire sex, however they identify, on the basis of their sexual orientation.
Because, again, it all comes down to whether or not you think men are women. And whether or not sexual orientation is based on gender, or sex.
If you are implying that you accept men can be women, the natural question would be does that extend to the bedroom? Because that's the proof of the pudding.