Don’t let anyone chastise you for this. Most desk locks are easy to pick. Also, there are like 3 keys to have on your keychain to open like 80% of all manufactured locks like the ones in furniture. Deviant Ulam, a pen tester, gives a lot of talks on this topic.
I pick my battles, I’m not going to complain about a policy unless I think it could really hurt people. If I complained about everything i think is dumb, I’d never be able to keep a job, because most of it seems dumb to me.
No the reason for these types of structures is simply to prevent passive leaks of information which is a far more common occurrence. Any large business is frequently visited by vendors and agencies who also work with others in the industry.
Similarly, if you're presenting externally, it's a good idea to close open applications that are not relevant to prevent info leaks from Alt-Tabbing.
Actually having a competitor pay someone to come into your office to pick locks etc. is rare, comes with criminal liability and is easily detectable on security cameras.
Most "crimes" of this sort would be stopped by simply locking the drawer. Nobody believes that a simple desk lock would keep out a determined attacker.