I am definitely more concerned about the chance of someone who is licensed going nuts

How often does this happen in Canada? The odds of someone unlicensed and in illegal possession of a firearm committing this is far greater than what you’re claiming.

than I am about a random postal worker potentially seeing a packaged/secured firearm moving through the system.

1 in 10 Canadians claim to have packages stolen every year but sure, let’s continue to target Canadians who already go through a heavy vetting process by the RCMP and Canadian Firearms Program even more.