I used to be more judgmental about this stuff too. Having little terrorists of my own has mellowed me. I do prefer a kid watching YouTube videos on a tablet over the kid throwing a temper tantrum at the cafe. All parents need a break. And I feel like if my parents had had the opportunity to let me watch sesame street on a handheld device in the 80s at a restaurant, they would have in a heartbeat. There were for sure other grownups heavily judging my folks for allowing me to play Tetris on the Gameboy in the 90s while we waited for our food! And I still managed to get a bachelor's degree.
At the same time, they thought watching too much TV wouldn't be good for you and I don't think that has turned out the way they feared. All gamers would automatically become sociopathic killers and they didn't. I do think "social" media has proven to be detrimental. But the internet is vaster than that BS. Most pacifying tablet use will not turn kids' brains into a rotting mess.
And as they get older you need to have numerous talks. The sex one, the online predator one, now the weird AI/chatbot one, the one that contextualizes pornography and other disturbing shit on the internet one. And at a certain point, maybe 16 or thereabouts, you have to let go and hope for the best. They will find all this stuff anyway. You probably did as well. I know I did. The only thing that has changed is ease of availability for most of this stuff. So that's what we need to prepare them for and then cross our fingers.