Everything is about cost. Back in the 90's, we couldn't get to our fracked oil because our existing equipment wasn't able to extract it. Then prices spiked and it made sense to build/invent new equipment. Refineries are changing too, to accommodate the state of the market they serve.

The bottom line is that "we" (in the sense the upthread poster meant) have plenty of oil. We pump plenty of oil. People saying we need to pump more oil are ultimately just reflecting the desires of companies who want to pump (and sell!) more oil and not the putative nativist needs of "our" oil consumers.

The bottom line is that no matter what the US does, oil prices are on a steady, inexorable rise[1] as the world exhausts its cheap supplies and needs to transition to difficult sources (again, fracking is the poster child here). Everything else is just crony politics.

[1] Though at this very moment they're experiencing an external shock due mostly to the war in Ukraine.

One thing is that shale oil is expensive to extract and refine. It wasn’t until recently when prices rose again that it became profitable.