You can agree with both.
I don't think masks do anything, but I don't object enough to mount a protest.
And most importantly, If you want to go to a PRIVATE establishment, follow their rules or don't go. That worker who you just yelled at about your rights, they didn't make the policy. They probably don't even want to be there. So, as a decent human being, just wear the mask and be polite.
If you are so utterly offended about masks, protest at city hall or something. But leave essential workers, who are working just so you can continue to purchase the goods you've come to take for granted, alone.