There are numerous ways to "optimize" the brewing process. If length of the brew day is a factor, beer can be made with a 30 minute partial mashes and a 45 minute boil. Partial boils make it possible to make larger batches with existing equipment. And returning wort used for SG measurements can help improve brew house" efficiency on a per batch basis.
When learning how to brew, developing 1) good temperature control during fermentation, 2) proper cleaning and sanitizing of equipment, and 3) good wort handling practices make it practical to brew common styles well early in the home brewing hobby.
I'll be honest - brew house efficiency isn't a factor for me, right now, with my hobby. I doubt it will be a factor in the future (and, best of all, I don't need to have an opinion as to whether or not putting the SG measurement back into the wort is a risk worth taking).