What you're saying is all correct but I really think that hair like Nadal and Caruso looks much better than a shaved head and is perceived as such. I think that there a significant number of people who are not Norwood aware who would say "their hair isn't that bad... not like my grandpa.... looks fine" about them. In addition, even the people many of the people who are saying that Nadal and Caruso should shave it would probably say, after seeing them shaved, that their hair looked better before. The shaved head really is considered bad looking even if a guy has a good head shape. Look at The Rock with his old high hairline for example; it looked great compared with fully shaved. And Rock is a guy who can really pull off shaved. There is no solution to hair loss besides treatments. Certainly, if treatments don't work, shaving the head isn't a viable solution because of what I described. So I think that leaving the hair grown out when it can be grown out and combed (not all guys that you would call bald have this privilege e.g. Larry David, myself) is at worst equally bad as shaving the head.