[WalterBright]

There is a concept called a "legally consenting adult". The presumption is that a legally consenting adult is capable of signing a contract. This is why, for example, contracts signed by minors are not enforceable.

If someone is borderline on this, it's fine if the court steps in to give him some slack.

But the defense in the case under consideration was not lack of mental acuity, unclear legalese, ambiguity, coercion, or power imbalance.

It was "didn't read the contract".