People don't understand that the area under the curve will remain the same. Mask or no mask, the same percentage of people will be needed to reach herd immunity.
The only exception to this is vaccinations. They may give you immunity without being infected. (They are not without risk though.)
As far as I can tell, we got lucky this time and the approved vaccines are close enough to "without risk" that you can round it off to "no risk" unless you are extremely risk-averse (if you drive 100km without thinking about your risk of dying in a car crash, you are not risk averse and probably shouldn't spend time worrying about risks from the vaccine).
Still requires that vaccines are available though, which is not a given worldwide yet.
The only exception to this is vaccinations. They may give you immunity without being infected. (They are not without risk though.)