She's not even the most corrupt saint I've seen. I mean, she's still got a relatively good heart.
Why would you even consider recruiting someone who's not capable of doing the job? That people who're not able will apply isn't a problem with the idea. You just deny them like any job recruiter would.
Usually, even if you're unable to marry or inherit, you remain a noble. Well, fantasy systems are fantasy.
So his family was basically, "Please take him off our hands; we don't want him because he's a pain!"
No, you can't expect people to see through others' false appearances. People are generally quite bad at detecting lies.
This feels very much like dumbing everyone down to make her look smart.