attention is not fundamental:

Everybody does "attention" and "attending" differently. There’s sort of a sense in which there’s "only awareness" and "attention" is an illusion. Some people "attend" in a very "heavyweight" way, much "comes along with it." And some people attend more lightly.

Often, "attention" is "too tangled up" with "other things," and this can be a bottleneck. "Untangling" makes "attention" more "light."

The way to untangle attention [from other things and even completely] is no different than untangling anything else from anything else (muscles, imagery, knowing; see other sections). It’s all bodymind, all experience.

[See also: https://twitter.com/eating_entropy/status/1367920780823044097 Last accessed: 2021-03-05]