Our hair is the way it is because it was designed to protect our skulls from the hot sun of Africa. It's just nature's way of looking after her children. We've tried just about everything else. So thereof nothing forwent or bad' about black hair, there never was. Their hair may go limp at tunes, and can be a problem, but they don't call it 'bad'.
Oriental hair is very straight and correspondingly difficult to curl or wave.
These things should never be considered problems, however, just something to be dealt with honestly. It's time we 'come out from behind closed doors, and stopped hiding all the facts about our hair. You can well afford to lose one hundred and fifty hairs every day - and not go bald. If you lose more, and all from one place, well, maybe then you have a problem. All or any one of these things may damage your hair.