I understand it is not about the singing ability when rapping, but GH makes it out to seem that all rappers have no talent.
Not the case. That a carpenter building a house would not be a demonstration of singing ability would likewise not mean the carpenter lacks skill in his own trade.
What makes me cringe in regard to rap is only that it seems
to receive full categorization under "music", a qualifying equal to most of the rest subsumed by such. When it only has a minimal foot in music (latter construed as the fuller complexity it has developed over time) and another foot in whatever classification(s) gets worked-out as applicable to it. From a broader entertainment context, I can certainly grasp the talent and observational insight of rappers, especially those adept at formulating a competent "rap" right on the spot with any background scenario thrown at them.
But also, apprehending the degree of skill involved in a practice does not necessary equate to always greatly desiring the product yielded. It's humanly unavoidable that there are professions and artistic matters which I could genuinely applaud in regard to understanding the ability concerned and their usually or possibly having importance of some kind, but still wouldn't normally drive several miles off my planned route to watch, listen, buy, or request services from (minus a good reason).