I preferred less weight of meat when I used processors in the past. The only way to maximize yield is to keep "junk" meat, some silver skin, and other non-desirable stuff in it, especially in ground meat, so I wanted less to hopefully ensure better quality.
I have done my own processing for a very long time simply because I do not trust ANY processor to live up to my standards. I have shown 2 friends how I process my deer this fall and they were amazed by the low amount of final meat, but also at the quality, which is off the chart better than they've ever gotten from a processor before. It's a personal decision that each of us have to live with if we use processors and just have to understand they will not put in the same time and effort as an individual. It is a business, after all, and time is $.
I also do not eat shoulders, necks, ribs, etc. Those are for shooting and destroying. I bone out the hams, backstraps, and inner loins only using a no gut, no full skinning technique. If I want more meat, I will shoot more deer with our unlimited doe tags. I fine grind 100% of my meat and make it all into prime jerky. When done properly, you can not tell the difference between a piece ready to grind from any of the other cuts of meat. They are all beautiful red with zero silver skin or anything white.
Good luck with processors if you keep using them, but don't critique them too hard unless they are throwing in bloodshot meat and other crud!