"I dont like the way you're raising your kids"

My fiance said that to me because I allow my 10 year old, and sometimes her younger brother to play games and/or watch YouTube on a phone. Although he let's his younger kids watch TV all day. I dont see the problem or much difference, a screen is a screen. That comment just pisses me off to the max! She plays outside but when it's not good weather or late she plays on it because she gets bored in the house. The younger ones choose what is watched on tv and sometimes she doesn't want to watch them.