One problem with the claim that people in kollel are astronauts is that that is irrelevant to the importance of learning Torah. The basic idea of learning Torah is for everyone equally. There is no more of a mitzvah for a smart person to learn than for a dumb person. The claim seems to be geared towards creating a kind of elite class of superior beings whom others are in this world only to serve.
[I am not making it up that kollel-leit claim this. These are the actual words they use to justify using Torah to make money and to exclude others from their elite class.]
The other problem is that it does not seem accurate.
Astronauts have to go through engineering and math courses and rigorous physical training in order to become pilots in the first place. To be in a kollel, one has simply to be born into the right circles, and know the right people, and have the right friends. It has nothing to do with knowing how to learn Torah.
["Kollel" is where people get paid to sit and learn Torah all day.]
However the question does arise about learning Torah as opposed to worldly pursuits.
The fact that there are unscrupulous people in kollels should not deter one from looking at the basic question of: "What is the good life?" A life of worldly pursuits or a life of learning Torah?
[I have to add that based on the Rambam, Physics and Metaphysics are in the category of the Oral Law as the Rambam says in Mishne Torah and in the Guide. The idea would be along the lines of the Hidden Torah that is contained in the work of Creation as Reb Nachman mentions. But there is more to it than that. The Rambam is for some reason not expanding on this theme much. [In the Guide he brings the idea that there must be something that particularizes universals into the spheres. That is to prove Creation Ex Nihilo Something from Nothing. That is he is saying there is a unity between the Divine Mind and Being, (between universals and particulars.)
[The Rambam here is hinting to a connection between matter and form]
The question is really not related to people in kollel or people that work at all. The question is for people that want to choose a proper path in life. Is it better to choose a life of learning in kollel or a life of work? Which is more nobler? Which is more worthy? Which brings one to the ultimate goal of of attachment with God?
So I am not thinking about one particular kollel or the other but the more basic question of proper direction in life.
I was in the Kollel at the Mir Yeshiva in NY. I believe that if I had stayed there things would have been a lot better for me and my family. That was a unique kind of place. Other yeshivas and kollels seemed to me to be disaster zones.
Thus the only conclusion I can come to is that learning Torah is important and if you are doing it in a good place then --by all means- continue. But if not, then just do your learning on your own.