Facts (that you should be able to verify easily through e.g. a quick Google Scholar session):
1. Gender dysphoria is real and touches a significant part of the population. It makes those affected by it suffer mentally.
2. Transition is the only known way to cure gender dysphoria, and it does indeed work.
3. People very rarely regret transitioning (<1% of them, less than the rate of people regretting having their children, and most of these "detransitions" come from religious or social pressures).
4. Trans people are no more susceptible to committing crime (sexual or else) than the average person, if not slightly less so (they are, on the other hand, ~4 times as likely to be victims of violent crimes, because of the prejudice and rhetoric targeted at them).
Axioms (that I hope we both agree on):
1. Helping people feel better, or at least not hindering them while they try to, is good.
2. Ostracizing people because of something they can't change is bad.
Conlusions (that you have to agree with if you accept my axioms and my reasoning):
1. Facts 1, 2 and 3 + Axiom 1 => We should let trans people transition, and whenever possible, even help them to.
2. Fact 4 + Axiom 2 + Conclusion 1 => We should let trans people participate in society as no one gets hurt in doing so, and trans people have to transition for their own good, so it would be unfair to attack them on that basis.
You also have to understand that just as you are imposing your ideas as "objectively right", in the other societies the other side is doing the same. Thus you are making a political take because it is a value judgement on how societies should operate. You might not like it or not but not only is it a value judgement incompatible with most people in the world, but it is also part of a faction inside your own arena (left wing coded Western politics)