I must admit that whilst I am interested in the engine temp I am completely uninterested in the time...I know what the time is when I leave, and I get there when I get there! and I stop on the way if I need fuel, a pee or my bum dies! so what do I need a clock for?
I like knowing what time it is. I have other responsibilities to other people beyond arriving safely on the bike, and those responsibilities generally have times and durations.
This is a fairly normal state of affairs, I am given to understand.
You could make similar arguments against pretty much all additions to a bike.
"Why do you need a GPS? There's a road in front of you to follow, what else does one need?" *theatrical carefree swish of whatever hair remains*
"Why do you need a headset? Why would you want to be bothered by worldly concerns while on the open road? Why listen to music when you could be listening to the well engineered purr of a well tuned V4 on the open road?"
Yadda yadda *yawn*
The man wanted a clock. Good luck to him.
Cheers, Shaun