Contracts are only as good as the wealth, power, and ability you have to fight in court and ensure they get enforced. Which is why they 1. usually have lopsided boilerplate terms that protect only the powerful party, 2. are usually largely written by the wealthy, powerful corporation, and 3. usually only enforced against the relatively powerless consumer.
In the ideal fantasy world, contracts are supposed to be "meeting of the minds" between parties of equal power and benefitting parties equally. But when I think of "contract" today, I immediately think "weapon used by a company to beat up a consumer".