I still pick up a lot, but not everything. As a Wilderness Ranger I would carry a couple of large bags out after a 4-day tour. Nowadays I just have a pocketful or two. I won't pick up anything that looks like bodily fluids have touched it.
I also have been rewarded over the years for this behavior pattern. I have gotten a couple of hiking poles, pieces of clothing, and multiple cameras.
Keep your eyes open. Give back to the trails we love so much. No obligation. Just do what you can. Every litter bit helps.