of course cultural practices plays into individual perceptions! but in absence of modern grooming there is still grooming that is occuring. even tribal peoples without access to modern technology and without the modern industrial post industrial social economic institutions still groom themselves. we don't live in prehistoric times, so while this question may be interesting, it is irrelevant.
What your asking will never have an answer.
It all depends on the particular situation and circumstances.
Your trying to compare apples to oranges.
I'll explain.
There are men who look great when bald: Bruce Willis for example, Vin Diesel. There are other men who look awful that way.
Being bald may make you look better if you are unkempt for some people. For the others not.