Competence vs. possibility
As we get more experienced, we get better, more competent, more able to do our thing.
And it's easy to fall in love with that competence, to appreciate it and protect it. The pitfall? We close ourselves off from possibility.
Possibility, innovation, art--these are endeavors that not only bring the whiff of failure, they also require us to do something we're not proven to be good at. After all, if we were so good at it that the outcome was assured, there'd be no sense of possibility.
We often stop surprising ourselves (and the market) not because we're no good anymore, but because we are good. So good that we avoid opportunities that bring possibility.