That actor is popular with everyone.
I heard that everybody likes the smell of parakeets.
This seems to be the common impression among everybody.
If we're talking about ten thousand persons, then we might as well be talking about all people and everybody, because that's a lot of people, you know?
The reading for 万 is a bit weird. It's ばん instead of まん. So, when you think of this word and think of all people, think about how they're all cheering "banzai!" at the same time, together. BANZAI BANZAI ALL PEOPLE RULE.