The moral issue is when the executives at Uber know with certainty that their driver compensation and incentives push drivers to neglect required maintenance on their vehicles.

Much in the same way tobacco companies knew for a long time how addictive and harmful smoking was.

And how Facebook knows they let their advertisers scam their users, and the way social media was pushing teen suicides higher. They knew and kept pushing policies which made the problem worse. All so they could collect bigger compensation packages.

Would they risk a taxi ride if they knew that Uber failed to properly background check a driver, who later kidnapped and raped one of his passengers, and Uber's response was to hire private investigators to dig up personal information on the victim in an attempt to discredit her? [1]

[1] https://www.bbc.com/news/world-us-canada-42291495