I believe the main stated reason has been that the USPS loses money and they want to make it break even or profitable. Assuming that's the reason (and not election interference), why should such an infrastructure be breakeven or profitable? And why now, during a pandemic?
There are plenty of government services that aren't even close to breakeven. I imagine USPS actually might be one of the most self-sustaining federal departments. Why should this particular one be profitable? Why should this one be privatized, out of all of them?
The USPS has been one of the most stable, reliable, and predictable forces in my life. Their informal creed speaks volumes to me: "Neither snow nor rain nor heat nor gloom of night stays these couriers from the swift completion of their appointed rounds."
I'm open to hearing arguments for why the USPS should be profitable (or privatized) and why now is a good time. I'm finding a very hard time imagining why.