Vacation

I've been things and seen places.

~ Mae West

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I think it's simple enough to understand why people need vacations.  Just break down the word "vacation..."

Vay — as in short for "vaya" which in Spanish means "go."  Also, a variation of "Vey" as in "Oy, Vey" which in Yiddish means "Oh no, I need to get away" or, more literally, "Oh, woe."

Cay - short for "Okay" as in - "It's okay to take a break every now and then."  Also a sandy reef around coral.  Who wouldn't want to visit a cay?  Everyone would.  Who lives there?  No one.  That's why it's part of vaCAtion.

and finally

Tion — or "shun": to avoid people whom you have to be around in your regular life but whom you cannot stand.

English is a super-simple language.