You’re moving the goalpost. Using a tablet at home is different than watching TV for 7 hours at school.

you are meeting lazy parents, which is sadly standard nowadays, my kids 4 and 6 never used tablet and phone (ok, I let them press button occasionally or they can stop alarm clock or timer when I have full hands, but their total use would be in minutes, I occasionally show them their photos/videos or picture of something we talk about), they watch children tv shows on TV ~45mins before dinner and 1-2 kid movies on weekend.

Yeah I've got lazy with the TV but I still feel their use of technology is healthier than at most of the people/children since everywhere I look people just put phones/tablets to hands of little kids and still get them hooked at early age, let alone potentially ruin their eyesight development.