I don't have a sticks & bricks. Not in the US. There is no option to leave anything behind unless it goes into a dumpster.
The advisability of carrying depends on you style of travel. A weekend warrior does not need much when home is not far away. The vacationer, away from home for only a few weeks & never far from a source for parts or a tool, does not need much either.
The land version of the bluewater sailor needs to be prepared. There are plenty places where there is no cell services if you avoid the interstates & even avoid secondary roads out west or in the mountains. Do a trip to Alaska & there are hundreds of miles with no cell service. Next day delivery does not exist.
The savvy traveller carries things like brake pads, filters, belts, extra fluids, stuff that can be used later if not required when you are 47 miles SSE of Nowhere.