I'm speaking to social media in general. Is it not undeniable that if there's a public outcry on social media, that politicians pay attention? Does it not then follow that access to social media is fairly important to having a voice in our politics? Is it not also true that something like 50% of Americans get their news form Facebook? These are only surface level facts, there deeper issues like, for instance, ability to organize political campaigns for a cause without access to social media being severely hampered.
I don't know what your threshold for "essential", but access to these platforms sound pretty important to me, and I expect these trends will only increase.