Brains are mostly organic threat modelling engines.
Their priority is not to look for growth but to make sure one doesn't die. But since the world has become a relatively safer place for humans, nowadays, our brains also like to avoid discomfort.
Your brain will avoid growth if it's uncomfortable. If you are looking to grow, start looking consciously for areas/skills that make you uncomfortable. And if you are a leader, make this part of your organisation's culture.
That is the first step to continuous growth