Then they shouldn't be in the rideshare business. Or any job that requires direct contact with customers.
If you work in retail you don't have the choice to avoid someone with a service dog either. It's just easier to ask your coworker to take over for you.
I mean, I sympathize with them, but that's no excuse. If you can't stand blood you don't become a janitor at a hospital. If you can't stand raw meat you don't become a janitor at butcher shop.
There are other ways to drive a car for money that don't involve interacting with people and their possible service animals.
If you work in retail you don't have the choice to avoid someone with a service dog either. It's just easier to ask your coworker to take over for you.