I don’t really understand why it’s legal to write contracts that waives the law. Like, recently I bungie jumped and the waiver I had to sign said things like “

I don’t really understand why it’s legal to write contracts that waives the law. Like, recently I bungie jumped and the waiver I had to sign said things like “I waive my right to sue in case of gross negligence” and to me that just seems absurd if it would hold in court.