Well let me tell you about the biggest disservice academia does to PhD students. Or at least some of them. But it's worth mentioning, my PhD is in computer science, so your mileage may vary.

So first, in my experience, there are two kinds of advisors. There are some who give their students a ton of latitude, and are genuinely interested in what they get up to. Then there are those who see grad students as pokémon, and the reason to catch 'em all is that it helps with grant funding. These professors set the agenda, and their offices have all the whips and yokes you could need for slave-driving.

The latter professors prepare grad students for the realities of academia. The former group mean well, but I can't help but feel they're trying to live vicariously through their students. Because they long for the freedom they once enjoyed.

Actual academia is an unending series of songs and dances for funding, interspersed with teaching undergrads who don't give a fuck. This is also why you almost certainly see a huge difference in professors' attitudes toward undergrads versus grads: they have hope for grad students.