By being tolerant to failure, you will be open to try new approaches to situations. This will give you more options to pick from, that actually work
By being tolerant to failure, you will be more open to challenges. Challenges are where we grow as we push ourselves to take a chance.
By being tolerant to failure, you will be more open to the realization that no matter how smart you are there will be mistakes you can learn from.
By being tolerant to failure, you will be more open to learn by experience. We learn by instruction, observation and experience. In most cases experience is far more effective and one way we learn from experience is through failure.