Developing and testing the technology in actual test scenarios (build entire testing cities and fill them up with paid stuntmen and -women, if necessary) instead of in public, until you're able to prove that the tech is statistically at least as safe as human drivers. After that, you can continue testing in public, provided that you deal with any changes to your system responsibly and ensure that the public is not exposed to additional danger because of your testing.

This is actually very common in the software development world. For production-critical systems, companies go to great length of creating a staging environment as realistically as possible, but fully separated from the production systems. You may get around that effort if the only damage you can potentially do is people not being able to see stupid cat pictures on a social network. But sorry, for life-critical tech, the move-fast-and-break-things approach is irresponsible bullshit.

> I would happily take a million deaths right now if it meant driverless tech instantly became available to everyone

What if your own death is guaranteed to be among them? Still "happily taking" it?