That is a very interesting observation indeed.
But one problem with rough surfaces is that even if their dust accumulation is less noticeable, they have the problem of gunk accumulation. You know, oils, organic matter, anything sticky. And while getting rid of dust is relatively easy, getting rid of gunk requires more serious effort.
Then again, there's an idea that having a few hot spots of problems (in anything in general) is better than having the same amount but distributed evenly, since there's less entropy. I'll have to think about that.
My problem right now is that my walls are painted with matte paint, it literally soaks up oils and dirt, and it's impossible to wash it off, only paint over again. Walls painted with glossy paint would not have this issue.