Stupid Questions

Munsk on reusability:
"...Assuming the reusability factor, we expect to do more refurbishment than we do manufacturing original stages..."
I've lived by the motto that the more stupid questions you ask the closer you get to the truth of engineering problem.

So after reading this I have to ask this stupid question: why would you put so much emphasis on making your rocket system as reusable as you can?

If it requires a larger work force, and more refurbishment to refurbish old rocket stages for future use is it really cheaper than just rebuilding it from scratch? I'm probably going to get in trouble for saying this but are we really sure that expendable launch systems aren't really the way to get to LEO on the cheap?

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