That was my thought exactly. It’s the contrast between “You’re just a scavenger,” “No, I’m a Jedi” that makes it work, imo. Sort of culminates her arc across the trilogy; and it’s much more personal now too. And you know what? I don’t think she does ever call herself a Jedi specifically - but it does tie back in to what Luke says in TLJ: “I will not be the last Jedi.”
While i kinda like the line “I’m all the sith!” because how over the top it is… I 100% agree that cutting it and having rey responding “No, i’m a jedi” to “You’re just a scavenger” would greatly improve the movie and fit more with her arc.
At this rate, with Ascendant V2 (Rey Nobody version), TROS is going to become a good movie…
This community is truly amazing.