At one time, even as late as the late 1970's and early 1980's, it was common when applying for a job for the interviewer to ask to see your pocket knife.
No pocket knife?
You were unreliable, unprepaired, untrustworthy, and did not get the job.
Broken blade?
You were careless, used the wrong tool(s) for the task(s) at hand, and didn't get the job.
Knife rusty (a patina was acceptable), blades dull, broken/chipped covers ...
You were lazy and did not take care of your tools. You did not get the job.
Knife in good condition, sharp blades, with or without a patina on the carbon steel blades?
If you were qualified for the position, you got the job.
When I was a young'un, from the first or second grade onward, it was assumed every boy in the school had a pocket knife in their front pocket. (And that the girls probably had one in their pocket or purse.)
It was not considered unusual for the teacher to borrow a knife from a student ... other than it was unusual the teacher didn't have their knife with them that day ... The teacher always returned the knife to the student after cutting the whatever or sharpening the pencils.
Back then, the "normal" and/or "average" man would no sooner leave home without his pocket knife as he would forget to put on his pants that morning.
I've had at least one slipjoint in my pants pocket every day since 1960 (I was 5) plus a Buck 110 or Old Timer 7OT on my belt since 1968 or 1969.
Full Disclosure:
I got a Buck 112 roughly 5 or 6 months ago, and have carried it some instead of, or with the 110.