Regarding boredom, I know a lot of sailors bring with them physical media, i.e. books, DVDs, video games, etc. knowing the internet connection will be slow.

I know getting fast internet at sea would certainly make life better for people traveling across oceans a lot, but the question is: Is is worth sacrificing the night sky for astronomers over?

As you point out, it's largely a value judgement between worldwide fast internet and ground based optical astronomy and it's one I'm conflicted about. I comfort myself with the thought that because of the expense these constellations either will bring internet access to large numbers of people justifying continuing satellite replacement or they'll fail and the satellites will be gone sooner rather than later, but as I say, I'm conflicted.