They aren't necessary, just a lot of selfish capitalists think they are, so we end up with over priced, under-performing connectivity and call it progress that has numerous other impacts the world over and call it progress.

Regardless, had our governments had a modicum of foresight and listened to scientists, they would have been able to enact rules that limited the negative impacts of sattelites on scientific research and the people of the world.

But they didn't and the capitalists win at the expense of everyone else, again.