I carry a benchmade knife everywhere. Why? Because all hell breaks loose if you have three kids and only one nectarine. Not that you need a fancy-ass knife for such work.
Other field-knife activities include “what does the inside of this seed look like?” and “I got a splinter!”
The only issue is even though the state of California permits them, the university of California forbids carrying knives, and there is one of those right in the middle of my city.