There’s a wide range of possible product designs that sit between fully end-to-end encrypted chat and completely public microblogging.
nostr:nevent1qvzqqqqqqypzpwleyw4fy3sxt7yvgrran0mpenxqlululur94r9jlax0hd3q3rc7qyxhwumn8ghj7mn0wvhxcmmvqyg8wumn8ghj7mn0wd68ytnhd9hx2qgkwaehxw309aex2mrp0yhxummnw3ezucnpdejqqgz4ey33gzmv09klyajqsjknucyp7c7uqs262tzghlmds9lhgh070y4pscpq