You are conflating two totally separate issues: 1) drugs that people abuse because they have mood-altering & other effects they like & which cause them to experience some kind of high, & are psychologically & physically addictive; and 2) drugs that have unwanted "side effects."

Yes, all drugs have "side effects." But not all drugs are addictive or subject to abuse.

Sure, but trans men taking T to physically transition is not abusing T.

Yes, that's true. But women normally have testosterone levels that are a teeny-tiny fraction of the male levels that trans-identified females try to reach & mimic by taking drugs. Moreover, endogenous T produced naturally by a girl or woman's ovaries & adrenals is not at all the same as the exogenous, artificial T mass-produced in factories by Big Pharma.

Sure, but this is what trans men take to pass and to be mentally healthy and not be dysphoric. It's no different than me taking my anti-depressants, ADHD and blood pressure meds.