you cant always rely on kickstarts either, sometimes a little somthing goes wrong or the carb gets flooded, i dont want to be kicking for ever until it finally starts up, but if i know it will start within 5 kicks or less everytime it wouldnt be a problem
what if your out riding alone, you fall off, tweak your ankle, you can get up but it hurts alot, how are you gonna be able to kick it? you could kick it wth your other leg but sense it will be backwards you wont be able to kick with as much power
or say you hurt your back pretty good, if i hurt my back i dont think i would be able to kick a high compression 4 stroke, even with decompression cables, thats why i think in most cases electric start is better, yea, it adds a tiny bit more weight but thats about it