There are tons of gender-inclusive greetings, for example “Y’all” “Friends” “Dears” “Everyone” “Folks” and “All.” You don’t even have to think very hard for more than a second or so to come up with a bunch. But I’m guessing you weren’t really interested in that… Calling someone “overly sensitive” for acts of exclusion (intentional or not) is narrow-minded. Exactly the kind of privilege Sam is pointing out, one in which you so comfortably fit into the dominant normative patriarchal discourse that you don’t even have the capacity to respect someone who doesn’t when they’re pointing out why it’s painful.