If you can do 95%, that might be good enough. Obviously if you could automate the entirety of the process, that would be ideal, but consumers may simply change their behavior to accommodate the 5% difference. Uber/Lyft already changed consumer behavior in a marked way: they allowed more people to move closer to the city, not pay for a car, not pay for a parking spot, etc. In Seattle before the pandemic, it was common for young professionals that didn't own a car to take Uber/Lyft most days. They did this so frequently that yuppies were blamed for the increased traffic, even though many of them were served by Seattle's great mass transit options.

The cost, simplicity, and availability of self-driving cars will undoubtedly change the consumer.