I've recently been introduced to drywall repair methods that depend on substrates such as tape and metallic mesh. One technique I've seen for the mesh was to score (i.e., make a surface cut with a utility knife) the drywall around the area and rip off a layer of paper and paint, with the goal of making an indention that can be filled flush with joint compound. Makes sense.
Now, for drywall tape alone, I've seen a few videos on YouTube where they don't make a recess on the drywall. I guess the drywall repair tape is pretty thin. Also, a friend told me that drywall gets most of its structural strength from the paper and that ripping it is not a good idea.
So my question is, if you're just using paper tape to fix a drywall problem, should you create an indention by scoring, or just use the tape alone?