Contract law isn't absolutist like that, and it can't bind both parties in a way that's unreasonable or contrary to certain basic rights-related laws. That's why you can't contract yourself into slavery.

What'll happen in cases like that is that it'll be litigated, interpreted, and either amended through a settlement agreement or annulled.

As others have said, the law isn't a programming language. It's a human system that, while being rigorous, strict, structured, and binding for the most part, is nonetheless capable by design of nuance and interpretation within known and constrained bounds.