I can give you some in universe examples why ethics are important, and in the hard way at that
*Looks at character sheets.*
*Literally looks at squad member.*
I don't think you really have to. It's kind of self demonstrating. Than again I don't think the argument would get through to her either.
:)
This being said, both you and a couple of the other characters have established that the government science program is not exactly on the nice side. So I am just playing off what happens when someone is raised by two mad scientists that actually get paid for their work.
All in all though if I go too far at any point or am wrong in my interpretation do correct me immediately.