They don't necessarily have to retransition to regret their choice though. There have been widespread negative side effects of Lupron for example, and that's one drug.
It gets a lot of attention like anything else that was once completely taboo but then gains a measure of acceptance. Although this has the added fuel of impacting society in tangible ways when it comes to managing the obvious physical differences between biological males and females. Sports, prisons, etc. We've already seen the boundaries being tested to the point of pure madness. Housing biological males alongside females in prison based on nothing but them simply saying "I now identify as a woman." Biological males dominating female athletics. These things are gonna draw attention, even if they currently impact only a small % of the population. Because new norms matter. They define how we coexist going forward.
I agree with your overarching point to some degree about new norms, however the details are important. Things like men being housed in womans prison simply by saying so, isn't happening for example. It's a fiction. Only a little over a dozen transpeople are housed according to their lived gender in the US and the process is overtly challenging. This story is well worth a read:
https://www.nbcnews.com/feature/nbc...ways-incarcerated-men-s-putting-many-n1142436
Getting the facts straight is important on both sides when dealing with an issue as divisive as this. My personal opinion:
On the issue:
Transpeople exist and should have equal rights (bathrooms yes, sports within regulations).
While most research shows that transitioning is mostly positive, a lot more research needs to be done. First line of treatment for body dysmorphia should be psychological treatment that is neither affirming nor conversive, before moving into any medical or surgical options. Simply ignoring mistakes and negative consequences is just as bad as ignoring the positive ones.
No one under 18 should undergo gender reassignment surgery, however social transitioning and perhaps puberty blockers might be reasonable if they continue to show improved outcomes.
The increase in people transitioning is probably partly due to less taboo and stigma, but also due somewhat to social trends. For some it is definitely a phase, although most of those likely end up in the "non-binary" category.
On the politics:
Claiming you are another sex, without diagnosis or medical evaluation, doesn't make you one. Biological sex is real, however again, trans-men and woman exist and I have no issue with them being treated as their lived gender.
Transgenderism is relevant for a very small percentage of the population and even with the increase in trend, will always be that way. Allowing that tiny minority to be incorporated into society isn't dangerous.
Too much noise is made about the issue (either by virtue signalling or by demonizing) and more effort should be put into understanding the science and less on using transpeople as a poitical football.