(I don't know that I've ever attempted to paste an emoji into HN before, and I'm rather glad to learn it strips them out, though they're fine in other contexts.)
Seems kind of biased to prevent some Unicode characters but not others. Those characters exist for a purpose: to more accurately convey human communication.
I don't like it, on one hand it's really sappy in a non-endearing way, on the other, https://avp.fandom.com/wiki/Facehugger (which incidentally is probably some foreshadowing of the time when the VCs start trying to get their returns)
It's mildly embarrassing to have to refer to it in a professional context.