Every business failure I've ever had has come down to one problem: overthinking.
It accounts for most failures in the rest of my life as well.
Of course, a total lack of thinking can lead to ruin. But, I think we tend to overcomplicate life in general.
Most platitudes about the complexity of life tend to envision utopias as real options and defy logic. We really are simple creatures with simple needs.
Complexity may be our way of dealing with things we don't want to face, like failure. This means the way we deal with failure leads to failure, which may be why intelligence doesn't seems to be favored in terms of natural selection. The most successful species who have ever lived are some of the "stupidest."
Ants don't care about their legacies and they will be here long after we're gone.
Here's my favorite philosopher on the subject:
Looking for a photography angle on this? I think Saul Leiter put it pretty well:
"I don't have a philosophy. I have a camera."