You (presumably) live in a country with rule-of-law. That means that if you are involved in a court case related to your GPL code, the legal system in your country will determine the outcome. Refusing to consult with lawyer in advance about what the outcome of such a legal proceeding will probably be, isn't going to improve your odds!

I have no clue whether whatever SFC has been claiming about the legal status of GPL is true or not (quite frankly, I haven't bothered even looking at what they're saying). But if the legal system's interpretation of GPLv2 doesn't match what most authors want or agree to, that sounds like precisely the kind of thing authors should want a lawyer to tell them, so they have a chance to switch to a different license.