So what you're saying is that it's an elective procedure not a medically-necessary intervention, and society shouldn't support any public funding for it beyond what they'd do for piercing ears or styling hair?

Futhermore, since it's really just motivated by desire, it's totally reasonable to address the issue with body positivity movements that address some of the root causes of desire?

Have you actually thought this through? This seems downright cruel to people who suffer from strong (body-morphology-based) gender dysphoria.