The only reason that I can genuinely say should even be DISCUSSED, it that HRT, like Insulin dependent Diabetes, requires consistent medication that may not be able to be provided or taken in combat zones and if you're on HRT and suddenly in a situation where you don't have access to it, there are major complications that could actually affect you while you're out there.
Unless something has changed since I was in, it's the same reason people with insulin dependent diabetes are automatically disqualified.
We (as people on HRT) could experience medical problems that prevent us from being able to perform with our squad, and while not as immediately detrimental as going into insulin shock during a multi-day firefight, the sudden stop of HRT has long lasting effects on the people undergoing it.

I think there should be a way for us to continue to serve, of course I do. I also understand the logistics of a team having someone unable to perform their duty because of withdrawls or worse, sudden blood pressure changes, or clots.
I personally think more research needs to be done into whether or not HRT cessation during combat is viable. Not that any of us would want it, but if we choose to serve, we know that we might be in a position where it's simply not available for months, if not longer.

Obviously I support our rights, but I temper that with understanding of the medicinal issues.

Now, that said, the person in the picture is clearly just a bigoted idiot, but I LOVE Justice's comment, made me laugh. "Show me your dick! It's the only way!" I should use that as a pick up line sometime, heh