Most likely several people tried to create the wheel and ideas on what to do with a circular shape were thought of, some cross pollination from physics resulted in it being used for transportation.
So I’d argue it was not done on a sunny day but mostly as an obsession just like most every other game changing idea
Now to make an actual wheel, with spokes and mostly 'hollow' inside and to put it on an axle - would have required better tools, so the wheel was probably created/invented quite naturally alongside the advances in metallurgy.
I don't think the idea is that people should stop investing in the future but that they should enjoy the path to get there as well.
The idea that you should just be unhappy but it will all be worth it once X happens is not good for your well being. Life can be hard and even stressful but that doesn't preclude you from being happy or fulfilled. For example, if you are working your butt off, you can feel happy that you did so.
I started piano at 20 years old which is really old compared to most serious pianists. I practice 4 hours a day despite working full time. I know that it is entirely possible I will never reach the level as the greatest pianists but I try anyway. I think the fact that I am not depending on being great to be happy makes it easier for me to keep going because each week I feel improvement and I know I worked hard and that makes me happy.
I've done a bit of Buddhist study my self and it wasn't for me. It was as if it was telling me to sit still and just relax. Well, I'm keen on relaxing and such, but there's also problems to be solved.
So enjoy the present, be in the moment, but don't neglect the future (or your health) as if it's not going to come.
> After enlightenment: chop wood, carry water.
-- Zen Proverb