I'm not sure why you say hurt feelings, rather than just "feelings".
On a separate note, historically, the medical profession has been terrible at ignoring or dismissing real issues that people have faced because we didn't have an understanding of them at the time. There's a very strong positivist bent that, if we don't formally understand an issue then it doesn't exist. Which completely ignores the fact that our knowledge of the body and brain and all their complexities (and all the ways they can vary and go wrong and so forth) was and is quite incomplete.
The attitude that, if we don't have an objective theoretical account of some mental/physical then the right thing to do is basically discount its reality has led to so much needless suffering.
This of course is not itself any evidence that someone's claims about themselves is true, but it is something that should always be seriously taken into consideration.
This is a risk of depression as well, and refusing to accept that someone is depressed does not make them any less likely to commit suicide.
The depression is not what's being contested. The claim that they belong to the opposite sex just because they say so is what's being contested.
And seems that no one really cares about the theoretical issues we, transphobic people, have in accepting such views. We're just that. And problem is if our daughters or sons will come one day saying they're transgender, they will have no arguments, but just hurt feelings and the requirement to accept them as they are, or believe to be. We, as parents, may do so out of love. But others will not. And we, as parents, will have to accept the high risk of suicide for a view that has no sane arguments behind.