They talk about information density. I'm not going to claim the site developers were competent, but I think the general trends are because companies don't want to pay for multiple designs for desktop and mobile (and deal with the ambiguous threshold between them).
Making high density responsive design is really really hard (if not impossible - mobile just doesn't have enough space to provide detailed data). This is especially true for tables.
With print you have a single fixed page size, and everything else in the design flows from that.
I'm not sure what the answer is here.