That could well be, but I am lazy and can be impatient. Which is why having parts cars is so appealing to me.
Need a fastener, bracket, relay, hose, linkage, water pump, spring, steering box, lever, or grommet? Simply go to the parts car and remove it - if it's still there and functional.
Yes, I obviously have parts in boxes, on the shelves. But until things get organized and I can actually find those parts, they may as well not exist.
Besides, I don't allow rodents in the garage, and it's less of an issue if they get to munch on parts cars outside.
About the only downside I can think of is that I pity the poor person(s) who get to clean up after me once I finally kill myself doing something stupid with a vehicle.