"If you could have read the document but didn't, that is your own fault and the contract stands." That's the point, isn't it? Gideon v. Wainwright clearly established that no non-lawyer can be expected to win against a trained lawyer. Since BigCo has a team of trained lawyers making the EULA impossible to read, ... Well, Gideon didn't go this far, but if we extend the logic in that ruling, there's certainly a major precedent that nobody can be expected to understand the EULA, and thus it might be void.