Its funny seeing Katakuri fans trash Kaido's AP for no reason lol and use this as an excuse for their fight.
Luffy has relentless willpower and endurance does not change the fact that G3 matched Power Mochi and the best of Katakuri was at best King Cobra level.
That G3 scene wasn’t luffy matching Kata AP. Kata just gets shock, luffy picked up on his attacks(learning FS). He an immediately counterattacks kicking him away. We already saw Kata while trolling could casually overwhelm G3 with his base. So an attack obviously superior clearly not G3 lvl.
Hell it’s even further confirmed by Kata base AP with CoA, overpowering Snakeman AP directly. Which itself G3+, it’s random to think Kata physically abilities > awakening.
Kata AP definitely suffers from the luffy endurance conundrum.