Not a headcanon, stop projecting. It's literally in the manga! Look at the hints. He doesn't want to kill his friends! Read damn it, read!
I never said Kizaru getting up is impossible. It's just that he already got a whooping from Luffy. Well it was one shot KO only but still a defeat. Next up it's all about Saturn now. Question is whether Kizaru is strong enough to stand up now or later.
If you have some weird headcanon of yours well it's not in the manga and if it contradicts obvious foreshadowing then better head out of here if that's all you wanted to discuss. Sorry dear, this thread was about facts, not your dreams.