Anything demanding significantly of the mind is likely to disrupt sleep if that sleep is to be had immediately thereafter.
Incidentally, drinking can also disrupt sleep.
Some of us aren't even this lucky. Without medication, I never have restful sleep, suffering paranoia, dysphoria, delusions, and sometimes severe hallucinations. Even with medication, I frequently suffer mild panic attacks at night requiring I get up and pace about the house. And there's nothing they can do for me about this.
But let me tell you something. Before I was medicated, even small things would make me jump. Even small amounts of exposure to horror movies or video games would ruin my sleep for months. Been playing SCP Countainment Breach. After SCP 173 killed me a few times, I stopped even being scared. I don't lose sleep over it in the slightest. You realize that you fear or something horrific occurring is far more damaging than the risk of the actual event. One's fear is far more deleterious than the object of that fear.
Anyone suffering mild sleep disorders at the hands of videogames are absolutely lucky, by my estimation. My mother, bless her heart, suffers severe insomnia because of the heavy demands of her occupation. My father is much the same. You would find easily that the stresses and responsibilities of a tough occupation are far more damaging to one's sleep than any video games. Don't see any people calling for a softening of their woes. But, whenever it regards the children, people lose their shit over it. It would be nice of people showed even a fraction of the care for other adults as they do ignorant children.