I think getting rid of dislikes might be good in comment sections where users interact with each other directly. Youtube has basically already done that, though. The comments have a dislike button, but it's well known at this point that it doesn't actually do anything and is just there for placebo purposes.

But getting rid of the dislike count on videos is I think a very bad move. In general, it doesn't tell you much about most videos, especially political videos. But for quickly identifying scams and clickbait? I believe that's basically its main purpose and that is invaluable. If an informational video on a non-political subject has many more dislikes than likes, you can be sure it's bullshit without even watching it.