I would not consider them safe unless everyone else was driving one.
No tiny car can be safe. Yeah, they might not burst into flames or whatever. But, their weight is damning.
Picture a ping pong ball bouncing off a bowling ball. That is about right regarding a tiny car hitting or being hit by a Toy truck.
Now, think about what is going on inside that PPBall or tiny car — one instant you are going north, the next south. Mebbe the car interior does not get crushed. Fine. But, your head is still going north, snapping your neck like a twig.
I saw this years ago when a friend’s wife was driving her sedan with her 3 month old kid in a “safe” baby seat. An arsehole ran the red light and T-boned her at 40mph. She was OK. but the baby was instantly dead.
Yes, size matters. Especially relative size.
Use steel...Period...
Yeah, it’s an arms race.
Most monster trucks don’t carry much more than momma’s groceries or a lawyer’s briefcase.
But real good at killing the occupants of normal sedans.