Generally, that’s how they transition; they get therapy and consult medical professionals to see whether it’s dysphoria or another issue. It isn’t taken lightly by anyone involved, and the dysphoria generally improves on treatment, as do their associated syndromes. They’re unwell, so they seek out the best treatment we currently have for the illness they’re diagnosed with.

The human brain is still far from being understood well enough to affect the incredibly complex feeling of dysphoria in the way you’re seeking. To compare medications and therapy to the tools of a carpenter, we currently have hammers and nails, and some crude saws. We’re on the cusp of creating chisels, and decades from grinders. Treating dysphoria would require a router, which is a decade past that. There aren’t any other solutions for this rare, often fatal, condition.

If you’re interested in helping those unfortunate enough to have it, and aren’t interested in standing back for medical professionals to do their thing, working in medical research to expedite the creation of other treatment options would be your best bet.

TLDR: you’ve overestimated current medical and psychological science to be able to have said any of this, but may be able to create your vision of a cure within your lifetime.