One point perspective is useful for action scenes, or scenes that implies stuff like camera forward motions, or to serve as an indicator of where the viewer should look. One point perspective is super useful for scenes with a lot of punch to them. It does not mimic the human perception but it creates pictures with a lot of power in them.
Else I often use one point perspective in scenes where the background is not important and I want to draw quick, else I usually go for two point perspective. Three point perspective is something very specialized I only use for establishing shots. At least that's how I do things.
As for vanishing points being object related ; no (and of that I'm absolutely certain). Vanishing points depend of the viewer. That's why on 1P and 2P, they always are located on the line of horizon, at the level of the camera. In one point perspective, the vanishing point is basically where the camera is pointing. Hold on I'll draw a quick mini tutorial
Edit : Here we go
Edit 2 : Also
Also as a side note I'm not formally taught, so I have to go through a lot of trial and error, so you might actually be right over me... altho I think the screen would make more sense in a two point perspective (and the other vanishing point should also be located on the line of horizon)
Here, the page is finished. Every type of perspective has been tried (aside isometric which does not make sense in a comic) (respectively : 3P 1P 1P 1P 2P)