1) Elon Musk has made many comments downplaying COVID19, and
2) In photos (even in their Tesla Return-to-Work Playbook), the Leadership Team doesn't wear face masks (only the low-level workers do).
The second issue is big. (1) They're clearly taking risks themselves (no PPE would be okay for a selfie, but these are clearly professional photoshoots with an AV team). (2) If leadership doesn't role-model safe behavior, you can't expect everyone else to follow.
In abstract, I agree Tesla should be the poster child for safely re-opening. In practice, if Laurie Shelby, their VP for health and safety, can't be bothered to even wear a cloth face mask to a photoshoot on how to reopen safely (I can't make this stuff up), I have serious reservations about Tesla having the in-house expertise to run a COVID-safe shop.
There's also the possibility of blowback. If Tesla re-opens without proper precautions -- and there's every indication they'll do that -- and those improper precautions turn out to be insufficient, that will make it that much harder for everyone else to reopen.
90% of safety is in attitudes, in being careful, and in being detail-oriented. The exact same high-level precautions can be 100% safe if executed well, and 0% safe is executed for PR or CYA. It seems Tesla is doing the latter (which is ironic, given their attention to detail everywhere else).