But tying effort, time or practice to art is absolute bullshit.

Agreed.

Effort, time, and practice can be important to the art itself. Filmmakers love long one-shot scenes because it's an impressive technical achievement and the end result is often made more interesting because of just how it was made. There are authors and sculptors and filmmakers and composers who created masterpieces that were only made possible by the decades of experience they've accumulated. For example, Tolkien's pre-LOTR career is a fascinating look at how he eventually acquired all the tools to be able to create a compelling narrative in a world he created.

But it's by no means required, or always better, to have the high effort or high skill option over a lower effort or lower skill artwork. Sometimes additional effort is a waste, or counterproductive. Sometimes there's beauty in the low skill or constrained or rushed option.

Art is a creative process, and any of the little factors can matter, but very few of the factors always matter. It's a "you know it when you see it" thing.