I don't know how many times I've talked about this & I don't care. It's because I've taken too many back doors in my past and don't want to take any more.
Once you're past half way, there's no reason to turn back. However, you still have to move forward & finish what you started.
When you leave an out, a side door, back door, open window, the struggle is to ignore the opportunity, however small, to take that out.
When you have no other options to consider, there's nothing left for you to do but succeed.