I grew up with one in my pocket. Got my first knife, a BSA knife at 6. It wasn't a real BSA knife but a Montgomery Wards knockoff.
That knife went everywhere and did everything from my own adventuring, camping, goofing around in the woods, went fishing, and anything you could imagine using a knife for until I was about 10.
Then my Dad got me a CASE trapper which rarely left my pocket. About 2 years later I bought a large CASE stockman. Now I had three knives! That stockman did everything from starting campfires to scraping off old gasket material and cleaning off corrosion on the ignition points as needed on my '59 Ford one ton truck.
More years go by, more knives. I am a contractor that grew up in the trades, so there has rarely been a day that I wasn't carrying a knife for work. It is still that way. If I leave home without a knife in my pocket, likely I will return for one. Never, ever do I go a day without at least one knife.
I grew up with them, I use them to help make a living, and I just plain love having a well made, hard working tool in my pocket. For me, it's part of who I am.
Robert