A driver is still supposed to remain alert and have their hands on the wheel, this allows Tesla to collect telemetry on autopilot so it CAN work on improving the software to handle these conditions better. I think the flaw here is the hands-on requirement is much more lenient than it should be, if it allowed the driver to keep their hands off for two full minutes (it is supposed to slow down if a driver isn't keeping their hands on the wheel) then I'd say that's a very poor design choice.