Jumbo serves his purpose
They need someone who can literally grab the ship and move it when it comes down to it, or to save everyone if the ship were to be destroyed. He gives them a huge advantage on the ocean which was their main weakness. He’s also a strong fighter and helps with diplomacy and with plans, consistent, strategic, and strong. In a real pirate crew not everyone would be best friends. Jimmy is there to work.
They need someone who can literally grab the ship and move it when it comes down to it, or to save everyone if the ship were to be destroyed. He gives them a huge advantage on the ocean which was their main weakness. He’s also a strong fighter and helps with diplomacy and with plans, consistent, strategic, and strong. In a real pirate crew not everyone would be best friends. Jimmy is there to work.