He does have a point in that anything owned and operated by the general public tends to be maintained to a lower standard than anything owned and operated in an industry which has rigorous maintenance standards and penalties for not following them, such as the airline industry...
Nobody is trying to sell flying cars to the mass public- yet? I hope not, too. The flying cars which will actually be overhead any time soon will all belong to corporations, possibly the ride"sharing" companies, maybe taxi companies. Maybe Google, or Amazon, who knows.
Even with private aircraft and pilots, the pre-flight walk rounds can take more time than the flight - precisely because it is necessary to ensure some level of safety.
Well, it's going to be a whole lot less necessary with aircraft which resemble nothing so much as a scaled up R/C quadcopter. Presumably most of them will be at least octocopters, with at least one design which is supposedly going to be in the air immediately using a four-boom octo design. They're all solid state and have only a handful of moving parts, and wear of bearings can be measured using microphones. Batteries will be continually monitored (as in, 24x7x365) and evaluated by software so that their condition is always known. Any component which seems the least bit iffy will be swapped out (trivially) so that the aircraft can be restored to service.
I still don't look forward to seeing them overhead, I think that there are better solutions. But maintenance is actually the least of my concerns. I'm more worried about allowed areas, flight paths, fundamental hardware and software design issues, etc. The hardware is actually pretty simple, but that doesn't mean people won't get it wrong. The software is not simple, and there's lots of room to botch it.