I have more gear than I can use, so I actually wish I could lend out my older/heavier gear more than I get the chance to. If I've gotten more than a decade of use out of it and it's second-string now, sharing the usefulness and facilitating someone getting outdoorsy easily outweigh stuff-protectiveness for me.

For my more recent/ultralight/precious stuff, (Quarter Dome, i'm looking at you,) I'd have to be confident that the person's at least as overly careful and detail-oriented as I am. That conjunction of request and person hasn't happened yet.... 🙂