You’re asking for evidence that can’t possibly exist yet. They’ve only had the FSD beta out for a week, and only for a tiny subset of the fleet. It takes time to accumulate accurate stats and publish them. According to the NHTSA, there is one accident for every 479,000 miles driven. For Teslas with automatic safety features disabled (no AEB), the accident rate is 1/3rd the NHTSA average.[1] They’ll need tens or hundreds of millions of miles driven to get accurate safety figures.

1. https://www.tesla.com/VehicleSafetyReport

Many other FSD companies are doing testing with professional safety drivers, sometimes on closed courses or in specific cities with well-understood road systems. Presumably Teslas has done the same thing, and they have data from that? If they don't have such data, that means they're trying to develop this data using amateur Tesla owners on public streets all over the country, which seems quite a bit less safe.

Other manufacturers all rely on high resolution maps for anything approaching self driving. This is why Waymo is geolocked to a single city.

This is a beta release, you have to be quite gullible to think anyone would deploy untested software on the roads.