This doesn't make any sense at all. I don't know how they drew these conclusions from this setup, but it's ludicrous.

"who suddenly found themselves with extra time spent their leisure hours, "

So, a study on how new leisure time leads to playing video games somehow proves the reverse causation - that video games make people become lazy to get new leisure time?

This sees like the kind of hit-piece study the religious right was funding in the 80s and 90s when they were losing it over Dungeons & Dragons.