Well to be honest, TRT is nearly impossible to get in my country too (Japan). It's also not illegal so you can just buy it and take it yourself. Nobody really cares.
I think if we look at it comparatively, it all comes down to the Controlled Substances Act of the 70's and their equivalents that quickly followed in all western countries. It doesn't really have much relevance to the way we do medicine. I think America certainly has a reputation for being extremely open about prescribing any kind of medicine, even if it's unneeded. Even Aspirin in my country costs about 10x what it would in America. They only give percoset to dieing patients because they believe that a permanent and irreversible brain change (insanity) occurs from exposure to those drugs. It all has to do with the Buddhist concept of things from the inner which are clean, and things from outside which are dirty. It's kind of a theme in Asia. That's why you can go to a lot of places in Asia and people think it's ok to drink water as long as it's moving, even if someone pooped in it, if it's moving, it's clean. But if it came from America and it's called Dasani bottled water, probably poison. So yeah I'm sure that if even among these attitudes that testosterone is widely available in the east, the reason it's so tightly controlled and taboo in the west is because of the various controlled substances acts.