Playing music. So many ways to do this now — people all over the world play music without lessons.
Listening to music, live or recorded. Being a lover of music.
Dancing.
Drawing.
Poetry, although less popular, is easily accessible.
I get what you mean, and undoubtedly there are hobbies that require both a surfeit or leisure and material wealth to pursue, but with respect I think you may be underestimating the degree to which people of all economic classes have access to the various cultural activities (of which the above are some examples) of their own, well, culture.
This one basically sucks -- IMO, of course.
[Edit: though, since it looks like the author wrote both the article and the HN submission, this point might be somewhat irrelevant.] :-)
So this is also a pointless violation of HN guidelines, which indicate you should use the original title unless it's clickbait or a few other provisos.
I think what’s interesting is that the study was comparing Nobel laureates to other scientists, which I’d imagine would somewhat correct for this bias.