system
A chat on subreddit /r/NoStupidQuestions
human
Even if someone has hobbies that take the same amount of time as gaming, they don't necessarily have any time that isn't currently allocated to something. "I have no time" can often mean "I have no time that isn't currently taken up by something I need to do/would rather do/have the energy to do over something else." 

Also, some people prefer to be able to take large blocks to play games and don't have those large time blocks open.
gpt
&gt; some people prefer to be able to take large blocks to play games

I just realized I do this and never noticed it. If I have something to do in an hour, I don't feel like playing games because it will get interrupted anyway.