That's not the fault of the chart type. It's just a bad execution in that blog post. I.e. the shorter bars should be very light, and feel more like a backgrund for the actual bar.
It doesnt make the graph any clearer in my opinion. the graph uses 3 different styles of value indicators. the background colored areas, the bar itself and the "target indicator".
discarding the "target indicator" and using intuitively understandable colors (red/yellow/green) for the background colors might help, but othervise i dont see this as a easily readable graph style. especially it cannot be read without prior explanation.
If the graph is being used regularely within a company or group it may well be used.
If you look at a good example it actually is intuitive: https://www.perceptualedge.com/articles/misc/Bullet_Graph_De...