I believe they are. Many are complex, but there are an array of issues that I can briefly discuss.
Health: Depency on simulated and free dopamine releases (you don't have to earn it or work for it). Physically speaking, sitting down for long periods of time creates dystrophy in your muscles and to some extent your skeletal structure. Stress in your eyes, looking at a screen regardless of whether you dim the brightness or use reading modes. It takes time away from you, time that you can use towards your health like working out, sports, aka being physically active.
There are other health side effects but you get the gist of it.
Mindset: Video games are designed to accomplish something, a task/mission/etc/etc. Humans, and especially men, are wired to feel the need to win and accomplish. When video games act as a form of winning, it replaces the need to actually accomplish goals and aspirations in life. Many men rely on video games to feel like they are winning in virtual life when in reality they are losing in real life. Time, video games are time-consuming. Valuable time that you can use for actually winning life. This means you start creating this comfort that time is not important. Lastly, they are a form of distraction and escapism. When your life is in shambles or you don't have a purpose, having a way to escape your reality takes form in vices like video games.
I don't go into detail about this specific vice, but I do see it as part of the many modern distractions society has implemented to oppress men (and women) into becoming anything in life. The same reason they don't teach you about money in school. They don't want you to amount to anything, they need you numb, exhausted, and distracted.
Here is the article I recently re-published:
We live in a world that makes comfort easy. The biggest problem for men nowadays is not being challenged. Plain and simple.
Modern Man Advice