 What is the main reason that Gubelin is so resentful of Si’s decision?
They also had a banquet for him, complete with speeches by such bigwigs of the Department of Space Exploration as Academician Lofting Gubelin and Doctor Hans Girard-Perregaux. Doctor Girard-Perregaux was convinced Gubelin would have even worn facial hair, had he but a touch more courage. Gubelin, half angry at his friend's argument, leaned forward to snap rebuttal, but the other was wagging a finger at him negatively. He was drafted into the working force reserves, served his time, and is now free from toil for the balance of his life.
 He fears the end of the Space Exploration program, and for mankind’s research of space to come to an end.
 He doesn’t want to have to go through the effort of training a new spaceman, as it’s very costly and time consuming.  He regrets not having the opportunity of space exploration himself.  He fears the end of the Space Exploration program, and for mankind’s research of space to come to an end.  He hates the Welfare State and how it’s taken away people’s drive to learn and explore.