Normally, when founding a company, there is trust among the founders and they do not try to fuck each other with maliciously written contracts.

Trust is often misplaced, and there are plenty of people who seem nice initially while working to screw you.

When you write a contract designed to screw the other party, you run the risk of being discovered.

And when you're screwing someone who holds to the "no lawyers because you're supposed to trust your cofounders" approach that risk is generally greatly diminished.

That's true. Which is why you should trust...but verify.