One of the main themes of Wano has been the relationship exploration between a leader and his loyal subordinates.
Yes, Luffy and Oden are both naive, easily manipulated and reckless free-spirited romantic dreamers, but Oden’s philosophy to solely shoulder the burden without delegating to his loyal followers is what ultimately leads to his demise.
The symbolic imagery of carrying all his retainers while being boiled alive was perfect.
That’s why in Udon, Luffy said the country stopped moving when Oden died.
Oden didn’t inspire others to believe that they can shoulder the burden too. And that is why Luffy will be successful.