The argument against it that I would take is that being a self-diagnosed problem (a unique situation in both medical and psychiatric practice), with a really expensive (perhaps even cosmetic - after all here, if you can self-diagnose the problem, they can self-name the cure) solution, the people at large should not be forced to pay for it.
In the immortal words of the great American anthem, "It's your misfortune and none of my own." (You want to move here, that's pretty close to our national motto. And you just will not live it in the States, you will learn to love it - or, as we say - leave it) Why should I pay (i.e. be forced to work) for your problems? It's not a matter of national security. It's not a matter of public health (like treating tuberculosis or cholera would be). It's not a matter of the public welfare. It is you, and you only, and in the States, that dime is on your bill alone.
Given that the budget of the National Health is a zero-sum game like almost all budgets (if you give to x, you are taking from y) then, ethically, you have to look at doing the greatest good for the greatest number, of making what little money you have do the most work, and that gets tough real fast. For what it would cost to treat 100 TS persons you might well be able to treat thousands of others with different problems. I have a very easy time making a choice between the few and the many.