There actually is an applicaiton for this. I mostly print with PETG and I’ve yet to find settings that don’t result in an unsightly scar left by the seam. In some cases I can get away with using Random for the Seam Position. But, not always. And for those cases, I came up with a workaround: Designate an area for the random seam. That way, it plays like an intentional isolated pattern (aka the random scatter, confined to a smaller area, reads like a textured pattern–kind of a sparse furry skin). But, seam-painting that area is tedious using the Brush Shape, especially along the edges. And, what makes it extra irritating is that any change in the model, and all of that tedious painting vanishes (aka, has to be redone)! For instance, if you forget to Repair non-modals, or you load a new, updated STL in it’s place, all seam painting is wiped away.
Thus, please add Area Fill (like in Support Painting) to the Seam Painting tool. Because, with an Area Fill selection, painting (and repainting) random seam areas would be far less of a chore.