All the computer abstractions help solve computer problems and in turn make it easier to implementation solutions but doesn't make the business problems any smaller.

It still doesn't change the fact that the surface area of that layer is enormous, and so is the space between it at the bottom and your problem at the top. All the details in between is what you need to figure out.

I'm not completely sure the bottom can be qualitatively raised very far up. The digital computing abstraction is a qualitative model change, from physics to mathematics. Experience suggests that when you decompose a business problem, the lowest algorithmic details very often end up on, or slightly above, that bottom layer - so you need the ability to work on that level. Of course, if you're willing to limit your scope and problem domain, then a lot of things can be abstracted further - but they won't generalize.