It does sound like a lot of gear but it really only takes up a small amount of space and doesn't add too much weight to the bike. Also, most of what I carry in terms of tools is for overall general bike repairs, including adjusting seat posts and saddle, fixing a chain, handlebars, shoe clips, and basically fixing anything else on the bike short of a complete component failure. I do like long rides and am often far from home and immediate help and so being able to fix or patch pretty much anything that can happen with the bike is important to me.
Interesting I also go on long rides with my 52v 19.2 ah because it's my primary commuter since 1.5 yrs I go far enough to come back with a couple bars remaining pretty regularly. I have to be near 7500 miles by now. First year I did 5000. I would go farther if I had more range. I have never had to use any of that stuff on a ride but I did snap a chain two times but the throttle brought me back home. However everybody and every bike is different and if that helps you then more power to you. Personally I've been worry free except for the first initial hickups.