We also hand roll and rebuild things over and over again. We try to make abstractions and building blocks, but we aren't very good at it compared to other fields. It'd be like an electrician wiring up a house, and building the electrical panel from scratch every single time.
Yeah, but we either need to standardize on the (metaphorical) wiring and dramatically impede progress in that area, or accept that we will indeed have to build the panel from scratch.
