Let's talk real here. They had the worst plan to attack Kaido. "Oh, they will be partying and drunking so would be perfect time to attack". Except that they waited for LITERALLY THE WHOLE CREW OF KAIDO REUNITE at Onigashima so they are fighting a much bigger army. Of course they only wanted to get that 1v9 with Kaido and were ready to die for it. Raid was meant to fail as long they could kill Kaido would be a victory for them. Momonosuke could die too, they don't care. Just like Law was ready to die by Doffy as long he could destroy SMILE's and Caesar. But Luffy's factor changed things. Let's see what happens.