I don't think that working harder will get us out of this mess we're in, it's what got us here. I don't think we have decades to invent new machines (probably spraying poisons in inovative ways), bring them to market at the required scale - there is simply not enough time.
You seem like you don't accept that nature is already critically depleted, that biodiversity is severely threatened (or you simply don't see its value), and that we're doing (as a species) too little too late too reluctantly to change the current "business as usual" approach to solving this problem.
I accept that I can't change your viewpoint here & now.
P.S. being alarmed is not hysteria, an opposite to optimism, or even defeatism.
There is no alternative. Defeat and death are not an alternative to working harder. It is infinitely better to fail while having tried to overcome than it is to concede defeat, give up, and lay down. The former is noble, and the latter cannot, and should not, be countenanced.
Join the fight. I am right now today building machines that grow more food on the same land. It's my day job. We don't have to work on adtech and digital casinos. We can win, we can have fun doing it, and we can be prosperous and happy.