Do therapists know when their patient is the problem?

Know a person who is incredibly narcissistic and a red flag, but also charming and smart enough to make themselves the victim and everyone else the problem in all their situations. After suggesting therapy for the longest time, they actually started going, and now she is weaponizing therapy speak and its like the therapy is just validating what she thinks of herself. Do therapists actually recognize when their clients are the issue, or do they not care enough because they're getting paid, and just keep glazing them so they come back?