Technology assures long term survival and it is in a species best interest to develop them. That is apparent. Now the question is how do you nurture technological development?
It makes genetics different. Your argument sets the default environment to be fit for the stone age one. I can respect that, but it needs to be put explicitly more often than it is.
It could go like "If we were to suddenly revert to, in the far future, some sort of stone age like environment, our distant descendants may be very unfit for that environment. This would be unfortunate."
Ear devices for when they don't hear well.
A wheelchair for when they can't walk.
I'm afraid when Darwin passes by ( other group of gorillas) and the word of the strongest will be law.
( Just thinking out loud, with controversy :) )