what the fuck are you all talking about?
go look here:
VSalon Cycling Gallery
you'll see that bikes that are made to be ridden more than a couple hours a month are all the same despite large differences in rider physicality.
only a couple ways to distribute weight and put the wheels in the proper place so bike+rider can go where they want without having to think too hard. this is the magic of a good bike--it's nothing new
and no, bicycles are not supposed to be comfortable. i ride a rusted-out beach cruiser from time to time; very upright you'd say. it's pleasant to sit on but not to pedal anywhere
there's a difference