When did nostr get creepy?
They already know. :) relays don't need Draft events to reassemble to entire screen you are looking at at any second. The filters alone do that for them. In fact they can easily count how many seconds you looked at every post, in every part of the app. Yes, the draft confirms that you are writing something, but they are encrypted. The metadata they leak is the same metadata filters leak.
But the idea is to select which relays to use draft filters on. You could choose a remote one or nostr:npub1w4uswmv6lu9yel005l3qgheysmr7tk9uvwluddznju3nuxalevvs2d0jr5's citrine running locally. That's the next step of this. :)
Discussion
Has always been. Most apps are the same. I don't think there is a way to filter data without letting the server know what the filter is.