Can the human species go extinct in one go like the dinosaurs? nos

No. We won't go extinct.

There might always remain one alternative universe where a single boomer remains, always vigilantly waiting and watching his lawn. Unfortunately, that's not the universe we're going to, but it should serve as an inspiring thought to aspire to for the uncountable rest of us...

What if we don't even exist in the first place?

They didn't all die off. They became today bird's.

When the food runs out.. we’re eating the vegans