It explains why Sanjis power level was so wildly inconsistent between him blocking an attack from Big Mom, and lasers from Kizaru to getting tagged by Vergo.
No it doesn't. There was nothing inconsistent about Sanji's power level lol, only the Kizaru feat was particularly impressive compared to his level. You guys are taking an inch and running a mile.
This chapter is NOT saying that
every single time Sanji's
ever been hit in his life, he could've dodged it and chose not to. It's saying that Sanji generally fights recklessly and takes damage he otherwise could've avoided because he doesn't care to protect himself as much as he cares to protect others.
This doesn't mean that Sanji's been running face first into damage since the manga started and never ever should've been hit. That's foolishness — that would imply that Sanji has never made any effort to defend himself which is factually incorrect as he dodges and blocks attacks often.
Your example also makes no sense btw as you're comparing 3 different versions of Sanji, the one with the Kizaru feat was the strongest version, the BM feat iirc was the one shared with Luffy which isn't even a particularly impressive feat.
Start of Elbaf Sanji up to the end of this chapter was around high YC2/low YC1 and now he'll be stronger than that, and he'll also get CoC shortly too. That's all we know.