Maybe it would be helpful to look at the five hindrances (sensory desire, ill-will, sloth/torpor, restlessness/worry, and doubt), and then think about whether it is possible, useful or feasible to try to suppress any of them during an actual practice.
For example, how do we "suppress" the torpor, or doubt?
The point of these hindrances is that they interfere with the effectiveness of the practice.
If any one of them is present, then it is a part of practice to figure out what to do with it. I think that is a part of developing the insight.
If the act of "suppressing" develops a tension and that doesn't feel good, then I think it would end up leading to the ill-will, or worry, and maybe doubt about the method of the practice. It is basically self-correcting.