There are a lot of things about being a human being that can hamper our desire to be successful. One of them is the pervasive and universal motivation to avoid pain.

In no particular order, at work that often means we:

Avoid speaking up
Avoid boring work
Avoid the hard work
Avoid non-urgent tasks
Avoid presenting
Avoid the truth

I could go on.

Obviously, the pain at work is rarely life threatening and usually worth the pain.

We are all human. We are all fighting for our lives. Just important to recognise when it might be useful to fight our biology instead.