You're assuming that because a contract is simple you're more likely to understand it correctly. That is horribly misguided. In all likelihood you don't fully

You're assuming that because a contract is simple you're more likely to understand it correctly. That is horribly misguided. In all likelihood you don't fully understand contracts regardless of length because you're unaware of the entire legal environment they exist in. The reason contracts often have weird stilted phrases is that they have specific meanings established over decades if not centuries of legal battles over those semantics. A good example for doing this right are the Creative Commons licenses: they come with a summary in plain English for humans and a full license text for the legal system.