I think that there was simply no time for that. Ego says he was going to perform the surgery, but before it can be complete, Big Max's head caught on fire. The nukes were due in 3 minutes. A nuke hits Max in the chest. He waves goodbye and leaves.
If Max's friends weren't out by that moment, they would have been teleported into Skunkape's ship and killed. That means Sybil, Paperwaite, Norrington... and Sam.