It's worth noting that the poster you responded to said "from the faculty's perspective", not "from their adviser's perspective".
Individual faculty members care a lot for their individual grad students, and generally go out of their way to help them. They academic system as a whole (which is partially run by the faculty) treats them pretty poorly (long hours, way below market pay--often near the poverty line and largely without benefits that well educated professionals [which is what grad students are] would expect in any other job).
No one is saying that your partner is a bad person. They're saying that the system is a bad system.