There are absolutely problems that can't be fixed; Even with youth on board.
This makes me sad because it's unequivocally false but for someone to believe this in their core is such a societal failure.
What if you were to say that to Nelson Mandela? Che Guevara? Stephen Hawking? Winston Churchill?
Humans are insanely ingenious and have it in their capacity to solve any problem. Your unwillingness to engage in that is individual and equally frustrating. Luckily I will argue people like you are in the vast minority and outside of The Internet discourse many of us are in the real world striving to make it a better place.