I quoted poorly. What I actually disagreed with was your blanket statement that the ST shouldn't adjust extras' DVs. As you said, for most Solars it's not an issue. But there are a significant number for whom it is.
You're talking about denying them successes that they should have. That's totally a question of difficulty. But the difficulty of hitting an extra is a tiny part of combat. Damaging them fast enough to get through them, while keeping your own DV high enough to avoid getting hit, means that a few successes either way can mean the difference between carving through them with ease and getting bogged down and overwhelmed. You can't deny that there is a point on the combat power scale where those successes make all the difference.
You're talking about denying them successes that they should have. That's totally a question of difficulty. But the difficulty of hitting an extra is a tiny part of combat. Damaging them fast enough to get through them, while keeping your own DV high enough to avoid getting hit, means that a few successes either way can mean the difference between carving through them with ease and getting bogged down and overwhelmed. You can't deny that there is a point on the combat power scale where those successes make all the difference.