Another objection: "Well, we can never know for certain HOW MUCH WORSE it could have been without masks." First, that's not science - that's unfalsifiable nonsense.
Maybe consider that the virus is beyond your control. See these 6 states with different mandates. Up and down.
4/ pic.twitter.com/HT7Ne9z5o4

— Justin Hart (@justin_hart) December 20, 2020