Since you're desperate enough to accuse me of lying, let me show you the panels.
Point one- "I can't just abandon everyone" "I doubt either of us would enjoy our adventures if we were worrying about Wano".
In other words, the real reason she is staying because Momo and the scabbards can't protect Wano, not because it fulfills her dream.
Point two- "But man, I still want to be one of you, a real crewmate"- she still wants to be a strawhat. She gave up on it because she felt she had to stay in Wano to protect it. This is the opposite of One Piece's core message.
Point three- "Careful Yamato, Momo has a lot of pride, don't wound it". In other words, she told Momo it's what she wanted because she knew he wouldn't accept her giving up her dream to protect him, it would hurt his pride.
Point 4- "I know, I'll find another reason for me to stay" In other words, what she just said is the only reason she currently has. If what she told Momo about wanting to explore Wano was true, she wouldn't need to find "another reason". This also shows that protecting Wano is not sufficient for her.
Your conclusion was right, but every detail of your theory was dead wrong. I agree that Yamato's story is likely done, but writing paragraphs about your headcannon theory doesn't prove anything when the manga proves it's just fanfiction.