I usually try to avoid describing speech as "dangerous" or "toxic" but in this case I think this is dangerous as it's a perfect fit for confirmation bias for someone struggling with video game addiction who wants it not to be true (I know from experience). That said, I encourage it's widespread dissemination because it's an important discussion. Upvoting to try to prevent this thread from becoming dead.
Using the DSM-5 as the only source is quite risky. Consider how they described homosexuality at times in the past.
Video games are absolutely magical! The human senses/brain system evolved to fit a very particular world with certain limitations, none of which exist in a video game world. You can get so deeply into the video game world that you ignore and are even unaware of basic needs like hunger. In video games your senses can become supercharged. You can obtain god-like powers that humans have dreamed of probably since the dawn of time (invincibility, flight, etc). A human brain that evolved with a basic dopamine-based reward center can easily be tricked/manipulated to crank out way too much, which is (at a very simple level) how drugs and other addictions work.
Honest question: do you think there is such a thing as sex addiction?