There are only 24 hours in a day so I suppose it makes a bit of sense that if you are on-line, like now, you aren't having fun on your layout: more time on-line less time at the layout.
As to running trains, I suppose it depends on what 'running' means. I know to some it means actually being there are the controls and varying speed, doing switching and de-coupling. I never do that (have not used a remote or electro coupler in, oh, let's see, since I got into O gauge?). But I imagine my trains run more than anyone's. I always set my trains to cruising when I am in the workshop or up in the layout room. Three trains (Mallet with scale reefers and caboose, ABBA ATSF F3s and nine passenger cars, and a Shifter with eight cars) and two 'streets buses have been running all morning, keeping me company in my workshop. I just leave them running even when I turn to this computer, as now.