That's clearly a specific case that they weren't talking about.

Separately, when people say "nobody does this" they aren't literally saying 0.0000% of people.

It's perfectly ok to say "nobody commutes by helicopter". It isn't a clever riposte to say "aha but Jeff Bezos...".

It's not that unusual at all though.

For a long period in the 90s and early 00s the main purchasers of vinyl records were DJs specifically just to mix one track at a time.

I even have some single sided pressings with exactly one track on one side.

Back then if you knew someone regularly buying new vinyl 9/10 times they were a DJ.

Right but it's very clear from the context that they were talking about normal listeners, not DJs.