I’ve been theory crafting around video games for children on the opposing premise. I think fundamentally the divide is on the quality of content — most games have some value to extract, but many are designed to be played inefficiently, and require far more time investment than value extracted.
Eg Minecraft, Roblox, CoD, Fortnite, Dota/LoL, the various mobile games clearly have some kind of value (mechanical skill, hand-eye coordination, creative modes, 3D space navigation / translation / rotation, numeric optimization, social interaction, etc), but they’re also designed as massive timesinks mostly through creative mode or multiplayer.
Games like paper Mario, pikmin, star control 2, katamari damacy, lego titles, however are all children-playable but far more time efficient and importantly time-bounded for play. Even within timesink games there are higher quality options — you definitely get more, and faster, out of satisfactory / factorio than modded Minecraft. If you can push kids towards the higher quality, lower timesink games, I think it’s worth. Fail to do so and it’s definitely not.
The same applies to TV, movies, books, etc. Any medium of entertainment have horrendous timesinks to avoid, and if you can do so, avoiding the medium altogether is definitely a missed opportunity. Screens are only notable in that the degenerate cases are far more degenerate than anything that came before it