30 seconds in barefoot shoes convinces you that you must change your form. But 30 years with your feet in what are pretty much casts, leave you very prone to tendonitis, stress fractures, etc. if you try to cover any distance in them. People that go barefoot for 20 years have strong feet. Most of us have weak, nasty, under-developed wussy feet.
They should not have made strong claims when there was no scientific evidence, though.
That's not what the lawsuit claims.
I just find it hilarious that people bought these and didn't understand that they had to change their running style.