Because as far as sharpening goes I have round heels. I find there is no "right" way, some needs and tools demand water stones or diamond, others oil stones or ceramic stones. In addition with all things being equal, they never are, I prefer natural stones to man made.
Going from left to right is a Shapton water pond with glass stone holder, expensive but works very well to both hold the stone and contain the mess. In the middle is some storage and the strop. The strop and the shop made stone holder are held in place by mounted battens (screwed to the bench top). The right end is for my oil, diamond and ceramic stones. All use the shop made stone holder and the battens are placed so the stone holder can be used either vertical or horizontal.
Hanging from the bench on the left is a angle setting jig. the front is used to hang some of the most used strops as is the right end. Above, that you can't see, is a wall cabinet that the paper towel rack is attached to and is used to store misc. sharpening gear.
The bench sits about a meter off the left (working) end of the main work bench. I've been down many sharpening roads, this has been the best so far. If I were to make any changes to the bench it will be to swap ends, put the oil stone area on the left and the water on the right because about 80% of my sharpening is on the oil stones and the left end is nearer to the main work bench.