Simple code is simple to fix, but without some layers of abstraction there will likely be so much of it that understanding is hampered along a different dimension.

Quantity of code can be reduced by increased complexity of the code, at some sweet spot between the two is your ideal, code that is neither so dense that you can't read it any more and code that is not so verbose that you're going to be overwhelmed by the quantity.

It's never black-or-white, it is always a trade off.