Quigon trusted the force. There were 2 paths, and he hoped for the one that didn't come to pass. And then he trusted that Obiwan would be able to stand in for him if he needed to.

The most damning thing he ever said was 'you were my brother Anakin. I loved you.' Because a brother was not what Anakin needed.

But, you know what, I blame the whole thing on Yoda. One kind word from Yoda. One reassurance from this being who had lived so long in the world he literally had no right to not have god like wisdom, and it all would have been averted. So many possible off ramps and they failed anakin at every turn. It's the most tragic story ever.