I remember vividly the moment I failed a quest because I made the npc wait for too long and thinking "this game is one of a kind". It does take a while to get used to, but it certainly has its charm.
Exactly. Also, to make sure the correlation is not caused by other factors such as income, health, education of the parents there should be a statistical correction to make it a sound RCT.
That said, I would argue more than 1 hour of screen time for a 1 year old is already an extreme amount and thus I would not be surprised to see it has some significant effects on development.