Look at this photo.
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Look at the coverage in that guy's donor area. Now try to imagine that skin in a different context. Imagine it's the transplanted recipient area on somebody's front/top or crown.
We would identify it as thin coverage immediately. We would know right off the bat that the short buzz is downplaying how sparse the coverage really is.
I'm not commenting on the ultimate aesthetics of that patient. Maybe you want it. But IMO that donor area is unacceptably thinned. Even "safe" donor areas gradually get thinner in older age, too. That patient's donor area is barely acceptable now but it may look noticeably worse in another 20 years. In 30-40 years it definitely will.
IMO the problem with most Norwood#6-7 transplants is that they get too ambitious on the crown coverage. The results can look SO MUCH more natural if the patient is willing to accept a visible thinning spot on the crown. The point is to recreate an earlier stage in the balding process, not try to cover a huge Norwood#6-7 shiny area with even density across the whole thing.
It's the same principle as the hairline. A fully-dense Norwood#2-3 frontal area looks a lot more
natural than a Norwood#1 with inadequate density.
To oversimplify it - We have enough donor hair to fully restore the front/top, or fully restore the crown. Not both at once. If you want major restoration work in both places then you have to compromise in both places.