hilariously, if you’re just “watching” a topic, you’ll get all the emails, with context, and you won’t get your own posts.
There’s really no winning that battle.. as many people hate getting their own posts, as worry their post didn’t go through if they didn’t see it echo’d back.
It’d have to be a per-user preference, and I can’t guess if it’s better to have it off or on by default (though on seems better, since people are more likely to act on “I wish I didn’t get my own posts” than they are to guess they could turn on an option to "get my own posts)
there’s many topics on meta about this already, though, no clear winner.