im not going to get into an argument about this but it seems your coming at this from a different angle but with the same result, let folk who are fuelled by hormones and the desire to show off and the result is the same but rolling a vehicle at the "low " speeds to me seems like an inherent design fault .
It comes down to knowing the capabilities and limitations of a vehicle.
Bicycles are not very good at cornering, but as an experienced cyclist you know how fast your bike can get around a bend.
If you were dumb enough to go into a bend at full chat and fell off, I'm sure you wouldn't seek to blame the bicycle.
Butler-Henderson cannot reasonably expect that little Citroen to take a sharpish bend at close to its maximum speed of 28mph.
Similarly, I doubt she expects the Lamborghini she tested in the same programme to go round a bend at its top speed of 200mph.
I reckon it would be possible to turn over pretty much any car if you tried hard enough.
Also worth bearing in mind the Citroen didn't flip over instantly, it gently went on to two wheels, giving Butler-Henderson plenty of time to back off and get back on four wheels.
There's an argument for saying the way the Citroen behaved on its limit indicates a safe design, not an unsafe one.