There are pluses and minuses to both, but I feel like mass media is the wrong term to use to diagnose the problem.
I'd say Mass Media is a huge problem if you happen to not be a member of the majority. Think about being a PoC in the 1980s where every villain in mass media looks like you. Think about being a PoC parent in the 1980s and having your children see people like you be vilified.
Personalized media is great IMHO.
In the Jim Crow era, black people were called "colored people." You would see "whites only," and "colored" written on signs everywhere. It was and is generally considered a racial slur. It fell out of favor after the Civil Rights era for good reason. I find it really peculiar and unfortunate that term has been reborn today, albeit slightly modified in the term "People of Color."
No, I'm just amused by the absurdity of it. I could just imagine a bunch of professors coming up with the term in a room who either forgot their history or just decided to mess with everyone. I can't imagine all the labels that didn't make the cut.
Anyway, I prefer to call people Sir and Ma'am; universal and respectful.
The implication being that all PoC have a common look? I find the unintended racism in this sentence pretty hilarious.