As a fellow pessimistic person, I'd like to share the idea that obstacles are not the end, they just mean one needs to be look harder.
I hope to switch you a bit from problem-finding to problem-solving mode.
You have identified some risks, great!
Now let's qualify and find solutions for theses in order to move forward.
For instance:
- assumptions check: young people adapt quicker than older people, so the retirees may not be representative of the others life stages
- solution proposal alpha1: education could teach people to look for purpose instead of teaching them a job
What are your solutions to the issues you've raised ?