We could lump those together as screen-time versus non-screen-time.

I hypothesize that converting an hour from one subcategory of screen-time to another is easier than converting it from non-screen-time to screen-time. I.e. it's easier to convince someone to watch Netflix instead of watching Hulu, than it is to convince them to watch Netflix or Hulu instead of hosting/attending a summer outdoor grilling party.

Netflix would show greater gains relative to competitors by converting more hours spent watching their streams. Any attempt to bring in more hours from the outside would also tend to help competitors, since they would then have an easier time poaching those hours from Netflix later. That might be beneficial in a nascent industry, but I think we're past that now. Nobody is going to be launching an explicit "stay in, and watch more TV" campaign any time soon, but apparently they all will whisper "now that you're already watching TV, why not just keep doing it?" via autoplay mechanisms.

And time spent working is definitely not leisure time, by definition.