This topic is similar to jigs in woodworking - you can get all fancy and over-engineer it but in the end, does it improve the product/output? If a fancy jig and a gross looking home-made jig both produce a 90 degree corner, what is the added benefit?

I think people put way too much emphasis on things like this with conclusions that they are faster and therefore its better. There is Pareto's law and a point of no return on invested time with this type of endeavor. I would feel better if people started off with "I did this because I can and I like doing things like this" vs. some argument that its better in some way.