FHE is an important tool because right now companies can be coerced by governments to break encryption for specific targets. FHE removes the need for companies to have a back bone, they can simply shrug and say "We literally do not see the plaintext, ever". They can kinda do this with End to End encryption when they're simply the network/carrier, but cannot currently do this anytime they're processing the plaintext data.

I come from a values basis that privacy is a human right, and governments should be extremely limited in retailiatory powers against a just and democratic usage of powers against them. (things like voting, arts, media, free speech etc)