I understand that there's supposed to be a filter that removes "Hi, " from the start of posts in the main space. But for answers on Meta, that seems a bit excessive. This is where new users come to understand the site (often after receiving rough treatment due to misaligned expectations); a more conversational, welcoming tone here seems reasonable and helpful to soften the blow.
It's especially jarring because "Hi" in this context is likely to be followed by a username, which doesn't get removed.