There are plenty of people passionate about perpetual motion and chemtrails. Until we get to a point where resources are effectively infinite, we still need some form of prioritizing research funding.
Even then, playing kerbal space program does not make you a rocket scientist. It requires a certain dedication to master various physics and mathematics disciplines to contribute to even a part of one, which is itself a significant investment that you won't find possible with UBI alone; there will still need to be some form of dedicated funding through either specific government programs or commercial enterprise.
Salary also has a bit of a sticky effect; people change fields less than jobs, and spend more time in jobs than in funsies hobbies. A rocket designed by a committee of hobbyists will likely perform much like any other design-by-committee process or product.
Even then, playing kerbal space program does not make you a rocket scientist. It requires a certain dedication to master various physics and mathematics disciplines to contribute to even a part of one, which is itself a significant investment that you won't find possible with UBI alone; there will still need to be some form of dedicated funding through either specific government programs or commercial enterprise.
Salary also has a bit of a sticky effect; people change fields less than jobs, and spend more time in jobs than in funsies hobbies. A rocket designed by a committee of hobbyists will likely perform much like any other design-by-committee process or product.