I think maybe 4 is a little young to ask a kid not to let their emotions drive them. But by the time they get to ages 6-10, video games can be a valuable tool for teaching time / life balance. Better to figure out at a young age that you have cravings to screw around when you should be doing something else, and you have to resist or bad things will happen.
Better they figure it out as a kid when "Bad things will happen" means "Parents will be mad." It's a lot tougher on them if they have to figure it out when they're a young adult, and "Bad things will happen" means "Flunking college" or "Losing a job."
Too many young adults can't deal with managing free time when they're first out on their own, and there are actual consequences to it at that point in their life.
Source: Was a kid once, was a young adult once, saw a couple other young adults wash out of college because nobody'd ever taught them how to stop playing video games when it starts to interfere with what they need to do.
What scares me even more is seeing parents of younger kids, giving them their phone and letting them watch episodes of Peppa Pig or similar, all the time. Guess it works to keep them quiet though...
4yr-old is very young for video games.
Giving your child video games is like giving him beer. (I learned this from bitter experience.)
Also, a four year old is probably too young to be drinking beer but I don't think beer with a low ABV (0.5-2.5%) is particularly bad for older children as long as they don't drink enough to get drunk. I could be wrong about that though.