But the question is, given that the latter are "outside of gaming", do they suddenly decide that "gaming is cool" because some children in a '80s-set sci-fi thriller show play a game? I am skeptical that they do.
Whereas people "inside gaming", i.e. they may already be playing videogames or board games (particularly the latter, in my experience), are much more likely to go "Hmmm, Critical Role sure makes role-playing look fun!" and take the plunge, because them it's a dive off the edge of the pool, whereas for the "outside gaming" people it's climbing a 30ft ladder and then diving from there.
I'd also note that fewer and fewer people are genuinely "outside of gaming" as you get younger. It's a bit like finding a kid in the '90s who was "outside of television" - they existed, hell, one of the people I used to play RPGs with a lot was banned from watching TV at all when at home - but they weren't common.