[alltakendamned]

Mankind will adapt to some extent and develop alternatives, e.g. hand pollination already happens in some cases now afaik.

There is even an entire group of technology optimists that e.g. think we might be able to break ground on another planet before the effects of us handling earth are realized.

In my opinion however, it will be tremendously hard to find working alternatives at the scale of feeding 8 billion people, across the entire world. I also expect that the effects will cause issues faster than we can adapt. As such it would be much better to prevent the issue as much as possible than to try and find working alternatives under time pressure. Once the effects start showing themselves and shortages become a reality, we will start seeing climate refugees, climate wars, etc etc.

But maybe we will succeed, maybe only 7.5 billion people die off and the rest can live another day up until the next mass extinction event.