Can you elaborate on the workflow you use where this is a incompetence-defining issue? I'm trying to understand but it just doesn't seem like a reasonable workflow - the only thing I can come up with is that you use the current timeline preview point as your desired edit location and then move a clip back and forth until you find the frame you want to cut? Wouldn't it be easier to scrub through the clip to the point in the video you want to edit and then use the mark in/out points or just cut the video?

I know everyone has their own editing style, but calling the editor incompetent because of this weird workflow issue seems a bit much to me.