"Feeling trapped" in the wrong body was really meant as an example, rather than a defining characteristic.
A lot of conflicting information gets trotted out to support particular stances. While comments have been posted in this thread point out that hormone treatments can lead to long term physical health problems, others might say the improvement in mental health makes it justifiable.
Better mental health found among transgender people who started hormones as teens | News Center | Stanford Medicine
A great deal of noise seems to emanate from the extremes of the debate, drowning out any nuanced discussion.
Montana’s House speaker has silenced a transgender lawmaker. Here’s what to know | PBS NewsHour
Trans people face hostile rhetoric from state lawmakers | PBS NewsHour
While it would be wrong to whisk little Johnny off to the clinic the first time he's caught wearing his mom's dress, there are
probably cases where gender-affirming care for minors is absolutely appropriate. The problem is that discussions of trans issues usually devolve to the extremes.
I suppose there is a spectrum, of sorts. To me, the term implies an infinite number of configurations randomly situated along a scale. Whereas, I think the overwhelming majority of us sit at the far ends of the male-female scale, with a tiny number overlapping the middle*.
*An example being an intersex person, who may have chromosomal patterns and/or sex organ features that don't conform strictly with male or female.