Right, dinosaurs were perfectly fine, their ignorance worked out well for them.
The universe is uncaring, simply not giving a shit if you have knowledge or not. Knowledge gives you the ability to survive minor conniption fits of cosmic magnitude, and at the same time gives you a gun to shoot your own foot off.
There ain't no such thing as a free lunch.
So you think your tech can help you survive the event that made dinosaurs go bust.
Yep, given enough forewarning with current technology asteroid redirection isn't out of the question.
Then again, we'll likely get ourselves with global warming first.