It looks like they were designed by a disruptive startup unburdened by the history and experience of designing and building cars.
Possible
While mechanical failures can happen in all companies, that do sounds like an inexperienced design (maybe from Tesla, maybe from a partner?)
Doing a half baked job on a part for your super low volume "we only make this to advertise a low starting price" model is something just about any OEM would do.
I bet their supplier just took whatever Chevy Van rotor they had that was close and modified it to fit and as a result it got a little thin somewhere.
Edit: Nope, I couldn't find a picture but I found pictures of big brake kits for the 2wd and clearly it's not an old (read: cheap) integrated hub and rotor.