As I stated multiple times in this thread, Rey’s “They were nobody” meant they didn’t have an actual reason to abandon her - they thought she was WORTHLESS. Even if you ignore Kylo Ren’s following dialogue, it retains that meaning.
“Oh, but that’s what Rey believes!” As I stated, it’s the storytelling truth or else that arc of moving past her awful, shitty parents who hated her would be pointless. She moves past them in TLJ by the time we meet her on Crait. (Again, link to STC, don’t really recommend checking it out if you hate STC.)
I do agree with you that she accepts they’re GONE, but it was ONE of the points of her TLJ arc, not the ONLY one - the other one was that she doesn’t care about her parents anymore, from a personal and validation sense, BECAUSE they threw her away like garbage.