If I sell steel, grain, boots, or launch services to the government and that gives me profits that I invest into some aspect of my business, I’m not sure that “subsidized by” is the clearest term.
The “SpaceX lives on government subsidies” thing is a myth.
If I'm being too extreme, can you describe a world where you'd consider enough problems have been solved that it's worth spending billions colonizing space?
Citation needed. What are the current projects to make this happen? Starship is a work in progress, but that by itself wont be able to create a colony out of thin air.
Not Rube-ish or rubish at all, IMO. I believe they're more interested in power or recreational drug use than problem-solving. Horses for courses.
Instead of establishing multiplanetary civilisations, they're burning our single-planetary atmosphere in their hubris and ego.