What we have here is an opportunity to see whether preferences are determined by the body or are only in the imagination. I will show the importance of knowing the difference presently.
Consider any person who "doesn't like" broccoli. What happens when they eat broccoli? Does their heart slow down? Does their heart speed up? Do they get trouble breathing? Are there any bodily indications that show that they shouldn't eat broccoli? If the body doesn't react to broccoli then the distaste for broccoli is only in the imagination. If the body does react, for example to peanuts, that allergy is not in the imagination. It is a real allergy. Most people have no real allergy to peanuts, but in rare cases there might be a real allergy.
Now the question is what difference does it make whether a distaste is determined by some physical problem or just in the imagination? Can we just find other ways for people to get the nutrients in broccoli from some other food they like? In the case of broccoli we probably can excuse people from eating it by offering alternatives. Their "distaste" might only be in their imagination, but that doesn't matter here.
There are times however when it can be important to distinguish reality from imagination or fantasy. If a person who was born a particular gender as determined by their body parts claims that they "really are" some other gender, does that mean they cannot perform as people of their born gender usually do, or simply that they will not?
Trying to play some gender that is not equipped can put a person at odds with society, which has rules about who might be required to serve in some military capacity or who might be preferred to get custody of children in a divorce or hundreds of other things involving sex.
If a person claims to be some gender for which they obviously have no real bodily parts, are they really some other gender or is that just their imagination? If it is just their imagination is anyone else legally required to play along with their fantasies? This time the answer is no. Some people who claim they cannot swim have the same bodily proportions and strength of people who can swim. Yet we cannot legally force them to swim. Gender identity is a different matter. There are likely more rules about sex than anything else and justifiably so.
What should be obvious is that science is failing. There are people in the media who believe society must legally accept that they really are some gender that is not determined by any bodily signs. It is apparently just their imagination. If anything can distinguish reality from fantasy it would be science.