No, this is just about the UX of drawing a long belt in a 2D grid. I think part of the problem is that they can't easily change the existing UX without breaking muscle memory for all existing players, and maybe they might not want to make it "too easy" to avoid throwing off timing or encouraging certain mechanics like blueprints or trains?

Although now that I'm looking at some tutorials, it's also possible that I just missed that they introduced a very similar feature.