It's not a valid contract if you haven't had the opportunity to read it. A waiver without legal power though? Well, it never meant anything to begin with.
Your signature on the contract will say otherwise. If you say you didn’t have time to read it, the judge is going to ask why you signed it.
Taken another way, this can’t work because otherwise everyone would just sign every contract without reading it and then get out of it later by saying they didn’t read it. Right?