Sure, it would be impure, and not top-to-bottom reproducible, and you don't personally have to do it. But it's a choice to avoid a compromise, not an impossibility precluded by the laws of math or anything.
Regardless, I no longer really sympathize with Free software's concept of a "freedom" that results in either (1) obscure purity, or (2) benefits large corporations at the expense of the rest of us.
RMS was economically naive, despite his counter-cultural leanings; I can't help but wonder what Free software would have looked like if he'd imagined the likes of MS/Amazon getting rich off it while creators get a pittance. We can't all have free-floating MIT jobs.