You're either missing or ignoring my point. An engineering degree might be useful in only certain, secular areas. However, there is no religious limitation as to whom an engineer can be helpful to. The benefits of a theology degree are clearly intended to only be applicable to members of a certain congregation.
Ah, I see. So you are saying that a Catholic or atheist can never go to a Lutheran minister and request assistance? They cannot choose to attend services at a Lutheran church?
Just another smokescreen, trying to cover up anti-religious bias.