True.
Far from the truth.
Puked blood at the end of chapter 1009 [
1]
Was wheezing and coughing while he was slicing Prometheus. Notice the "Crik" SFX from his shoulder area [
2]
Barely managed to stand after the attack while he was shaking like a COVID ward patient. Just like Kaidou was post the attack as well. [
3]
Overcoming pain and overcoming a mortal injury are two different things, especially when it comes to physical fighters. You cannot possibly expect mortal injuries to have no effects on your performance, would a Zoro with 30 bones broken perform the same way as Zoro when he's at his 100%?
As I asked, why do you think Big Mom healed her bones before fighting Law and Kid? That should settle this pointless debate honestly.