Why does Clement try to stop Sophie from buying Otto?

Clement tries to stop Sophie from buying Otto because he believes that Otto, being a robot, is not a suitable companion for her and may not provide the emotional connection she seeks. He may also feel protective of Sophie, thinking that she deserves a more genuine relationship. Additionally, Clement might be concerned about the implications of relying on technology for companionship and the potential consequences it could have on her well-being.