Everyone has their own comfort zone. It feels safe. No risks are involved. You know your territory.
But, it's dangerous there when you're too comfortable. You're too isolated and you risk missing out on good and useful ideas.
It's an interesting irony that some of the people most prone to stay in their comfort zone are educators. It may be their job to push others out of their comfort zone, but educators often don't stray from their own comfort zone.
The world is filled with interesting people and big ideas. Some of these could be very useful to you though they are not directly related to your field. You'll never know if you don't step outsize your zone and explore.
Are you in the health care industry? Learn about engineering, design thinking, philosophy.
Are you an educator? Learn about health care, marketing, construction.
Are you a student? Learn about everything you can. Start with the assumption that every subject has something to teach you. Start with the assumption that every subject is related to what you're interested in.
Now, go and find how they are related.