As a ride leader I carry way more stuff than I'll actually ever need [1], the excess is for those I ride with that turn out to be unprepared for whatever [2], the excess weighs perhaps a kilo or two? [3,4] but it isn't really that I'm a regular hero, rather I'm acting in my best interest and want to be on my way rather than wait for someone else to come to the rescue [5].
100's ideally need food/drink every 25/33 miles, as anyone can do 25/33 miles then rinse and repeat (possibly only the one day

)
[1] If what I carry doesn't get me home, I know I can always walk 'somewhere' (I use SPD's not ballet shoe/achiles poppers)
[2] but that really only works once-ish
[3] I'm cycling for excercise so weight hardly matters (and I've sure I've had a no.2 weighing more)
[4] the bike carries it not me [6]
[5] I won't leave anyone alone anywhere other than a pub/station/public space with heat/light
[6] the excess over 'my kit' [7] is just caliper brake pads and cables (family fleet all hydraulic/tubeless now) oh and 8-10spd quick links.
[7] 11spd quick links, 2 tubes, good old rubber patch kit, 1 set disc pads, 25mm folding tyre [8], CO2, tubeless plug and sealant/syringe.
[8] it travelled for 3 seasons and 1000's of miles just in case - I ended up using it as I'd worn through the casing, oops [9]
[9] I do M check too - honest...