Alas, you are the victim of "seminar education.'
Management types are going to seminars, the main purpose of which seems to be to reduce insurance premiums. These seminars teach a number of absurd, extreme things, all in the name of "safety."
That these positions are indefensible, contradicted by "safety engineering," or that not a single person invloved in running these seminars has even a single credit-hour in safety engineering are all irrellevant points. Management is the ultimate authority, and "safety" is but their favorite method of showing who's boss.
Getting back on point, in such places shipping clerks, and others who absolutely must cut things, will invariably be required to use a spring-loaded (automatic return) boxcutter, with blades that have had their points removed. Management has taken it, as a matter of faith, that there is NO legitimate use for a knife
Now, the situation need not be so; even where the 'real' reason is some misfit 'going postal,' the complete ban on knives is futile, and foolish.
I have recently completed a job in a medium security prison. As you might guess, there was a vary strict ban on knives (or anything else that could be used as a weapon). And, as listeners to the G. Gordon Liddy show will attest, prison guards are not known for being particularly smart.
Nevertheless, the prison had absolutely no problem with my using knives, pry bars, hammers, and lots of other things that would ordinarily be forbidden. They were able to recognise that I was a professional, that I had a job to do, and that 'the rulebook' had to conform to the real world.
I submit that some folks try to impose a manner of "freedom" that is far more restrictive than prison; but that is another discussion!