> it is a bit irrational to think that a person with no desire for space travel in the first place will say "oh look, space travel is cheap, let's make a satellite".

They won't make a satellite but they will demand things which middlemen can solve with a satellite.

> You have to find the customers, it is not like you make a product and everyone changes their desires to conform.

Once smartphones were invented, people found within themselves the desire for a smartphone.

Although there's a lot of debate about this one: https://en.wikipedia.org/wiki/Say's_law