[bawolff]

If someone made 500k, then someone lost 500k.

Any money you win gambling has to come from someone else, it doesn't just appear.

[dismalaf]

So you don't know anything about gambling lol.

Yes, generally both sides of the book balance (minus a cut for the bookie). But there's not automatically another exactly opposite bet of the same size lol.

[bawolff]

I don't think knallfrosch's post was implying it was a singular someone.

Like if you say "someone is at the door", you don't literally mean that exactly one person is at the door.