That's why some jurisdictions, e.g. certain civil law countries, limit the amount of stuff you can do in a contract in a business-to-consumer context. For example, in the Netherlands, all business-to-consumer contracts must follow the principle of "reasonableness & fairness". I can't give you an exact definition, but a "gut definition" is that if the judge looks at it and his gut feeling is "this is bullshit", then the contract is probably not legally binding. For example, as a consumer, you cannot agree that you have to sell your house to the other party for $10 if you fail to pay for the $30 service within 20 days. That would be an unreasonable claim.
Business-to-business transactions are however not subject to such protections. You can put anything you want in a contract (including unreasonable clauses) as long as it doesn't violate any laws.
The US is a common law country and as far as I know doesn't have this "reasonableness & fairness" principle for business-to-consumer contracts. In contrast to civil law countries, where judges tend to look at the spirit of the contract, common law country judges look at the letter of the contract. That's why old ladies can sue McDonalds when they burn their tongue on hot coffee. "Hey it's not written anywhere that I should be careful with hot coffee". And that's why US businesses have to put literally everything in contracts.