No. A lot of that depends on what grit belt that you start with. You would not want to use a 100 grit belt to touch-up an edge. The coarser belts are for removing more metal like reprofiling or repairing a blade. It's the same with a guided system - you wouldn't use your coarsest stone to touch-up an edge.
Personally, I bought the WS for convex edges and to use as a belt sander for small parts. Two birds with one stone kind of thing. But I am nearly 60 years old and disabled. I need to do things as fast and painless as possible. After watching many videos and looking at every sharpening system that I could find, I decided that the WE130 would be the best all around sharpening system for me. So I saved up and bought one.
My advice is to check out every sharpening system that you can find and watch a bunch of videos of them being used. Then decide which one, or two, are best for you and your situation. But be careful - some reviewers are so lazy and irresponsible that they don't even read the instructions of a system before they video their, "review", of it. And at least one of them is very well known. Which makes me believe that they have an ulterior motive for their feigned ignorance.
So, don't base your opinion on just one review, or one opinion. And practice with blades that won't break your heart if you mess them up until you get a good feel for the system that you purchase.