Because most of the DHT derivatives aren’t half as androgenic also probably don’t wreak havoc on follicles. Which makes them an improvement imo. I’ve been on .5mg dut per week, along with 2xWeek topical dut, min, tretinoin, RU for over a year ~13 months. I usually cycle a 1g mix of test, primo, nand, Tren, Anadrol, halo or Anavar. Proviron on cruise/trt. It’s crazy, I’ve regrown hair even at my temples. Barber says hair is thicker than when I first start going there 6 or 7 years ago. They get a bad rap but 5ar’s are decent and replacing the lost DHT with a less toxic androgenic alt gives me enough drive, focus, to replace whatever people claim are the pretty obscure “neurosteroids” that come from DHT. I could be wrong and I hope more research comes out on the subject. But until then quality of life is great with DHT serum about 70% suppressed(putting follicle dht suppression occasionally as high as 50%). Plus wiener still hard as a rod