Sure you could load light target loads without resizing. But I doubt it would last longer, it's the flairing and crimping that will eventually destroy the brass, not the resizing. I have some .38, .357, and .41 brass that's well over 20 years old and has been resized many many times with light loads and it's still working, mainly because I keep the flair and crimp to a very minimal amount, not because I don't resize them.