What bothers me, is people can take bad rock, bad pop, bad jazz, bad anything and put it to the side. But most people will not do that with rap. Granted I don't listen to rap that much anymore, my tastes have changed, but there is GOOD rap, and BAD rap just like in every other genre. It's a common misconception that all rap is about degrading women and killing people, it's not.
There is that, and there is a clear delineation of Rap and Hip Hop. Most cultural absent people don't understand that at all. I am not a big rap fan, I am African American, and I am a HUGE rock and metal fan, and I understand this.
And you are very correct in saying that there are bad forms of all music. Personally I think Modest Mouse is AWFUL, and I have heard a lot of their music. I just don't like how the lead singer sounds, as is the case with a lot of alternative music of that type. But if Apple had them playing at a conference or made a deal with them it would be no difference for me.
It escapes me how someone could say that they wouldn't want to make Jay-Z head of anything related to Apple because he is a rapper/hip hop artist/African American, and that he wouldn't do a good job because he is not European and doesn't know European music. That is the ignorance that went into hiding after the 1950's and is peeking its head back out. If those that have a distaste for hip hop, rap, jazz, and other forms of music don't like it FINE, but don't discredit someone and their ability to run a company because they have built their fortune off of it.