Well, this is where you start to get into semantics and a varying degree of subjectivity, but saying "it's a cure after you get a transplant" doesn't really justify saying that it's a functional cure if it requires something else to amount to such.
Secondly, I don't think most NW5s (as an example) generally have the donor to go back anywhere near NW1 to begin with, and with the presently-known efficacy, it's doubtful that this therapy would provide enough regrowth to bolster the effects of such a large transplant.
In my opinion, transplants are only a great option if you are low Norwood as high NWs generally don't get the density or any significant gains. I sort of roll my eyes when I see some poster who is like "I'm NW6 but now with my transplant and SMP I can look like I just have a buzzcut".
I suppose that's better than being bald to most, but I still hate the look and if you're just have a close buzzcut look, I don't see what the issue was with going bald since you're still ostensibly a "bald guy" to most others.