I personally would not ride without knowing how to change tubes or patch a flat. I’ve called my wife once in the last four years and that was because I was < 3 miles from home, it was 90 deg and I was soaked. My Domane is tubeless, so I carry two CO2 carts and my mini pump (habit). My Roubaix saddle bag has a patch kit and spare tube in it, plus I’ll carry a second tube in my jersey pocket. The mini pump goes back on the water bottle cage mount.