My land is mostly rock and hills. When the unit was delivered I counldn't figure out why the engine would momentarily cut out while going over rough ground. (or why the tractor seemed to ride so rough). I soon decided that I didn't need 30psi in my unloaded rear tires. In fact by lowering them to 10-15psi I could stay in the seat without bouncing up and down and having the seat switch cut out.
I then found that without the switch I could stand up for a better view over the hood when trying to "hook" or "nudge" things with the FEL around the shop and flower/rock gardens.
Now I'm finding in my old age that its a LOT easier changing implements if I can reach over to the go-pedal and move "Johnie" ahead or back one inch instead of climbing up into the seat to do it.
On a -20C morning when everything is covered in snow, the first thing I do is reach over and hit the key, then let it warm up before I climb onto that cold seat.....
I do agree that on a "gearshift" unit, the seat switch, is a DEFINITE safety feature, but on a hydro unit that STOPS when your foot is raised its of dubious value.