It's not perfectly safe. If it were, it would be legal everywhere and it's not.
Also, if you get hit by a Cybertruck at 55mph, the sharp angles are going to cut you far deeper than a Mini Cooper would. You're not going to walk away from it either way, but you're probably more likely to perish from the Cybertruck.
(That doesn't stop me from wanting a Cybertruck but that's just because it's cool in other ways. I don't know if I'd want one to be my daily driver, but it is very cool.)
At 55mph perhaps this doesn't matter, but most vehicle-pedestrian collisions occur at far lower speeds than that, and then it absolutely does matter.
I self identify as a Tesla fanboy, the model Y is the best car in the world in my opinion, but even I have to admit the cybertruck has several fatal flaws and just isn't a good vehicle.
On paper it has a bunch of things going for it, for example it is (as far as I know) the cheapest fully electric vehicle with air suspension. In practice it all falls apart (both literally and figuratively)
I wish Tesla would try again and build a new truck, without the cyber and the cold rolled stainless steel. Stick to the design language of the other Tesla models this time. Let Franz do his thing.