Medical transition causes long-term ill-health.
All medical treatment has side-effects and risk profiles. You are presenting known medication and surgical side effects - which are also experienced by cis people who sometimes need these treatments - as an argument that medical transition is dangerous and has no benefit.
It demonstrably does.
Holistic patient-centred cost-benefit analysis of gender affirming care overwhelmingly comes out in favour of medical transition.
Psychoanalytic quackery causes enormous harm and serves no actual purpose. There is no evidence for its efficacy. It is and has always been pseudoscience pushed by individuals with clear conflicts of interest. It is not evidence-based care.
Telling children that they may not be the sex they are, or that they have to pretend that somebody is not the sex they are, is immoral as it subverts safeguarding.
Begging The Question (assumes a reductive definition of sex to erase the practical reality of medical transition, assumes social transition of gender incongruent people is a safeguarding risk using prior assumption) + Motte And Bailey (argument is describing the safeguarding risks presented by cis male non-transitioners, but is used here against all people who have transitioned).
You are using an extremely narrow 'dictionary' definition of sex (either chromosomes or gametes) to make what is actually an argument about complex social behaviours in individuals who are, in this context, defined largely by how they do not conform to sex-influenced gendered behaviour.
First assertion presupposes that the debunked ROGD pseudoscience paper which continues to be promoted by SEGM/Genspect - groups which were founded, as has been proven by leaked emails, with the express purpose of manufacturing a narrative to support bans on gender affirming care - is serious, evidenced and accepted science. It is not.
Gender incongruence has been demonstrated to be much more robust than the early 80% desistence study which sampled across a very wide range of gender nonconforming children, not just those reporting a cross sex identity. That this paper is routinely the only one quoted by conflict of interest holders in favour of a wide range of subsequent, far more accurate studies which did not have this finding, is telling.
Children are not 'told they may not be the sex they are' by clinicians or carers. This is 'gender critical' mythology.
Part of growing up to be a compassionate, socially responsible person who can negotiate daily life without coming into constant conflict and causing offence regularly, is learning socially acceptable modes of communication. There are social rules around how we describe and interact with minority groups to avoid causing harm. Do you tell your child not to stare at or discriminate against people in wheelchairs? If so, you are already doing this. Special pleading to excuse trans-hostile behaviours just because of your metaphysical views is no more acceptable than special pleading to excuse racist slurs against people from Pakistan.
Multiple court cases have demonstrated that transgenderism illegally restricts the rights and freedoms of others.
Not one court case has demonstrated this to be true - 'transgenderism' does not illegally restrict the rights and freedoms of others.