Think about it - how do you increase the speed at which one can review code? Well first it must be attractive to look at - the more attractive the faster you review/understand and move through the review. Now this won't be the case everywhere - e.g. in outsourced regions the conditions will force people to operate a certain way.
Im not a SWE by trade, I just try to look at things from a pragmatic stand-point of how org's actually make incremental progress faster.
A beautiful building is only as good as the correctness of its foundation, framework, materials, and construction. Those qualities can only be assessed by those with expertise enough to understand their importance. Beauty in its proper place is the output of the intersection between a craftsman and a engineer. Beauty is optional, but it makes life more worth living. The same is true for code - attractive code is optional, but it makes being a SWE more rewarding.