The surveyed group was only 1000 people so I agree it's not statistically relevant, but the ages ranged from 18-44 so don't assume everyone is living on their parents' dime.
It seems like Broadway has lived in some area between a movie (relatively cheap cost to see one, or practically free on streaming) and a limited event (like a Taylor Swift concert), and while producers seem to be leaning more towards the Taylor Swift concert side of things with stunt casting and everything, what's interesting to me is when people say they'd pay $500 just from knowing the costs, without necessarily an A list actor in the show. (Granted, with hypothetical money I'm sure they're overestimating how much they'd actually be willing to fork up and it would probably be a bit of a struggle for shows to find the right audience that would be interested.)
This survey also led me to another similar survey they did last year, where it also seemed like people overestimated the costs of what a "regular" Broadway ticket would be, and didn't seem to have awareness of what kinds of shows were currently on Broadway as well as the kind of experience it would be (people mentioned needing to dress up and Broadway mostly being for CEOs or rich white people).
So my main takeaway from this is that Broadway has an outreach problem (though I suppose that's not really news) and a lot of people on a survey are at least open to seeing a show. Anecdotally, I work in an office building in midtown, where it would practically be impossible to come to work without seeing the billboards and marquees, and even then people who attend shows casually (like one a month) seem to be unaware of what is currently playing on Broadway, or they get surprised when a show announces closing because they just assume it would be around for longer.