A lot of today's music puts too much emphasis on the dysfunctional issues of life. Too much is about sex and violence. Too much of it does not motivate youngsters, especially, to build good character traits. Too much of it sells fantasies to kids who often end up disappointed or involved in unfavorable situations.
The oldies are loved because they bring back memories of the good ole days, the cleaner days, when life was simpler, and we did not have to hit the power button on the remote control when the kids walked into the room. Most people do not want their kids to see naked ladies dancing to blasting tunes while men call them W's and B's. Men exploit women, but they have the good sense to keep their pants and shirts on most of the time when it comes to music.
Many people do not like most of the present-day music, but more than enough do. The stuff we do not like is major business!
Every older generation has something to criticize about the new, and, one day, this generation will downsize something of the next. I suppose that is the way life is.