Fear: it is stupid. Yet it continues. What gives?

It's very odd to me: I can spend years training at something, attain externally-validated success in that area, and then still be full of fear.  Fear that I'm faking it, that everyone who praised my efforts was misguided, fear that it was all temporary.

Obviously, plenty of folks experience this.  And it's very comforting to hear other people's stories on that front.  But what I'd really like is to stop feeling it.  This particular type of fear is a waste of time and energy.  There are no lions chasing me, no real negative consequences that can't be dealt with if I fail.  Nothing will explode, catch fire, or do anything else that requires adrenalin to deal with.

So the fear can stop now, right?  It's evolutionarily maladaptive.  That is all.