You can still transmit the disease after getting vaccinated. Maybe if it was like the flu vaccine I'd understand, but it's not. I much prefer the mask mandate and the mask mandate is the only thing that makes sense, at least until they come out with a better vaccine. As it stands right now you have people getting the vaccine lulling themselves into the belief that they can't transmit to anyone, it's impossible to know the stats but easy to see it is just as bad as people who don't have symptoms thinking they don't have the disease and can't spread it.
If the goal is still seemingly to cut down spread this law does absolutely nothing but increase hubris and cause more cases as more people walk around without a mask. Walked into a CVS the other day and both the clerk and some customers had no mask on simply because they got the vaccine. So I'll stick with my mask for now.