I have shopped at places without cart returns. I bring it back inside. Always. It takes 1 minute.
right yes but that’s avoiding the question by contextualizing it within your own experience. When does it become unreasonable? Your answer seems to be never. Does that remove any moral obligation on the part of the store to provide cart returns? Why do they exist?
I don’t know what you’re driving at, but I have never encountered a scenario in my almost 50 years of life where returning something to the place I borrowed it from was so onerous that I left it for someone else to clean up.