Tittle on non-philosophers teaching applied ethics

Peg Tittle has absolutely no patience for non-philosophers teaching applied ethics. Is she right? Here's her case:

1. "As far as I can see, business ethics taught by business faculty, ethics programs run by managers, and so on – any applied ethics taught by non-philosophers – is superficial at best.  First, following a code is just an appeal to custom, an appeal to tradition, which philosophers consider a weak basis, an error in reasoning..."

Teaching students how to stand up for their values

Last semester was the first time I used Mary Gentile's excellent Giving Voice to Values in the classroom. While I'd been teaching business ethics pretty successfully for five years, I still had one set of comments in student evaluations that kept coming up: all of this talk about ethics from the commanding heights of a business was all well and good, but they wanted to know what they should do when an ethical problem comes up at work. How does one deal with a co-worker who wants to lie to regulators about a product defect, or a manager who is using her position to give perks to friends and family?