Also they have less ability to flex, so making for a harder ride and possible breaks at the j bend.
If I may answer from a metallurgical point of view.:-
The wheel (assuming correct construction and setting up of course!) will be stiffer and stronger with 10g spokes. It will last longer and have less overall wear.
If any spoke of any gauge breaks at the "J" point, it was either made badly, installed badly or set up badly, or was damaged in some form of accident!
This should not happen often, and only after considerable hard usage and high mileage. One might even see that as "fair wear and tear". for some riders....
Anyone "needing" a "spring" function from a wheel, should have bought a bike with suspension. Though any wheel has a degree of movement in it, thinner spokes would generally increase this of course, but also increasing wear at certain highly stressed areas, on thinner metal! Especially if a lot of really rough riding is done (as some do!).
Also, remember, not having suspension will put far more stress on the wheels and frame, especially when rough riding.
E-Bikes are generally far heavier, stresses are therefore higher, also some riders could do with a weight reduction (ME!) too!
Its like needing a Land Rover and not a Ferrari for a car! Everyone knows that on a rough trail, the Land Rover is better....
One has to simply accept more wear on wheel and frame components, if suspension is not bought for the terrain ridden over, but some do not want it, their choice of course!
I personally like suspension, front and back, but I am not a "hard boiled" MTB rider!
It basically boils down to a personal choice at the end of the day....
But replacing a spoke in a wheel, is no big deal if weight features highly in a rider's brain....I have never had a spoke break in my whole life of bike riding, over 60 year ( of bike riding)!!
I hope this helps to keep things in perspective....
Regards
Andy
PS. Old UK saying
"You "pays" your money and you takes your choice!" Learn to live with and accept those personal decisions....See here:-
https://dictionary.cambridge.org/de/worterbuch/englisch/you-pays-your-money-and-you-takes-your-choice-chance
Said to someone who must decide between different things and accept the results of their decision!
