You are comparing apples to oranges. Tank skills are all vital vs poor dps skill alignment. As someone who wants to be a tank (dark knight) or (warrior) and seeing the skills they get, I would hope they are smart enough to keep looking through the rest of their cross class skills.
On the other hand, you were smart enough to notice those were not important. I guess only the opposite scenario exists, no one would ever notice that some of them are important.
