On HN, the standard response is that earth-based observation is lesser than space-based.
Which boils down to "Use something incredibly expensive that we have very few of, instead of something that we have a number of that is comparatively cheaper. How dare you question the holy, sacred internet!"
Which boils down to "Use something incredibly expensive that we have very few of, instead of something that we have a number of that is comparatively cheaper. How dare you question the holy, sacred internet!"