Yes, we could all head over to the training arena with a spreadsheet and figure it all out. That doesn't make it easy for a new player though does it? Having the weights displayed in the hanger would show people clearly why you don't just load up 100% fuel for every jaunt, or the effect of loading up all that junk on the floor of the hanger on your Jug. HTC has all this data available, and it is a pretty easy programming job to show 'Base Weight, Fuel Weight, Ord Weight and Total' on a clipboard for us.
I switch rides a lot - I like to try out different rides, see their strengths and weaknesses. Often, I am confronted by the "less fuel and a drop tank" or "take a bomb" choice. I just wish I had more data on what that means to each ride. I'd like to know fuel duration and wing loading as well - the way I see it, the more information I have on a ride, the more likely I am to be successful in it.
$.02