Most of the people that will now be going to the competitor aren't the anti-vaxxers themselves, but just people who use Yelp and pick ones from the first page,

Most of the people that will now be going to the competitor aren't the anti-vaxxers themselves, but just people who use Yelp and pick ones from the first page, or by just scanning over the ratings. Call them lazy, sure, but there is nothing about them that would make them bad customers.