Chesedname, my mother raised 3 frum kids with all of us watching TV and listening to secular music. She didn’t even go to yeshiva!
I know plenty of families that had no TVs, no secular music and the kids went OTD.
If your only hold on your children is to keep them so sheltered that they have zero exposure to the outside world, then you must not be convinced that there is anything truly positive about being a frum person. Because being frum isn’t a negative experience unless you make it that way.