We are talking about thousands of years for the flip to happen, and hundreds of thousands of years between each flip. We have geological records that it happene

We are talking about thousands of years for the flip to happen, and hundreds of thousands of years between each flip. We have geological records that it happened, as for the damage, there was a theory that it was linked to mass extinction, but latest research find it unlikely. It would still be bad for us, but not something worth worrying about right now.