Very true it would be better time spent. But its all part of hunting. Lightweight is just another component. There are alot of pieces to this game we made it that way when it became more as sport than a matter of survival. I think as long as your safe doing this than have at but everything i also feel is somehow interconnected.
Trying to be the best at anything means looking after all the little things because they add up.
Weight, scent control, entrance to your spots, scouting, mobility, fitness, timing, understanding wind, and on and on. All these things have an additive effect. I want to be light as possible, it is easier on the body at 60 years old. I am in above average shape for my age but I could do better. Sometimes it is difficult to find time to work out... like this spring when many 16 hour days make fatigue a factor in working out. I don't feel like it.
Less weight means I can go farther, go longer, get closer to bigger bucks if I have to. It also means I can probably hunt later in life.
Being light is an important component of hunting for me. If I was 25 years old 1 or 2 pounds or even 10 pounds might not matter.