I can tell you that perhaps the biggest reason I enjoy the hobby of handloading is because it's something I can do on my time, unscheduled. There are enough steps and stages to building ammo (especially for us single stage guys) that you can go to the bench for an hour or 3 if you have the time and knock out a whole bunch in one caliber. Like this morning, I spent some time lubing 100 8x57 brass that I had recently bought, and I ran them all through the full-length sizer. Then I sat in front of the TV and cleaned all the dried excess lube off them. No, I don't have 100 loaded rounds ready for the range... but I'm about half way there for when I go back to the bench.
To go shooting, I've got to gather the equipment I need, gather the ammo, gather the firearms, load them in to the car, drive to the range, hang the targets, shoot 'em up, collect the brass, clean up the targets, then go home. Then I've got a trunkful of guns that need to be cleaned. It's quite an operation. I do it because I enjoy it, but I have to schedule time to get to the range.
Handloading, I can simply screw in a die and run a bunch of brass through a stage and close up shop when I need to head off to work or eat dinner or whatever.