“Good morning” is a term of welcome. “Good Night,” when said at night, is a term of leaving. You’d never say “good night” to someone who shows up at 11 pm for a party. Nor would you say good morning to someone leaving your house. Have a good morning, sure, or have a good day. Good Day is another term used while leaving. Then there’s Good Evening, which is the Good Morning of the night.
TL;DR Anon’s flame dashboard said good night, and he’s overcaffeinated and underslept and noted some wierd shit going on with wishing people Good [timeofday]
So too does “wherefore”. In old English, “where” meant “what” and “fore” meant “for”. So “wherefore?” meant “what for?”, i.e “for what reason”. “Therefore” is the opposite of “wherefore”, meaning “that for”, i.e. “for that reason”
That one has confused many a teenager reading Romeo and Juliet for the first time because it’s not commonly used much anymore apart from some versions of the Bible, and the idiom “Whys and Wherefores”. When she says “Wherefore art thou Romeo?”, Juliet isn’t asking where Romeo is. She’s asking “Why are you Romeo?” As in she’s lamenting that the boy she met is specifically Romeo, a Montague, a family enemy. She wishes he weren’t. Which is why she followed that sentence with “Deny thy father and refuse thy name.”
P.S. “how come” means “why” because it’s a shortened phrase. It could stand for something like “how did it come about that he died?” Or “how comes it that you know my name?” That is a bit of a mouth full, so people just casually dropped most of it to “how come he died?” and “how come you know my name?”