Fun fact. None of those things are perfect except staying away from everyone and your entire household doing so as well. Cloth masks work better when both/everyone wears one; that lowers the chance of getting infected to 3%. If only one person wears a mask, there's a much higher risk of infection. The vaccine and booster are great, but again, not 100%. It is good to stack things in your favor, but stuff still happens. To take the small percentage where people still get sick and use that to decide masks don't protect anyone at all is ridiculous.
Literally the only person I know that didn't get it was my mom and we were all masking, vaccinated, washing hands, etc. All those precautions did nothing but delay the inevitable.
I mean, sure, but if you hadn't used those precautions you would have gotten it sooner, likely spread it to more people who would have them spread it to more people, ect. The point wasn't to prevent infection for eternity.
Getting it sooner would have gotten it out of the way sooner and the whole ordeal would have been over with after it ran it's course instead of dragging it out for 2 years.
So, it does have to be a mask that will actually protect you.
If you didn't pay, a pretty steep price at the time, for the right mask (like something that will protectv you from paint fumes) then you were wasting your time.
Source: When I mask up I use N95's. I use best judgement, haven't gotten covid. Not too late to protect yourself. I don't think I'll be able to keep it up forever, but I'm banking on new vaccines kicking covids ass.