I'm not expecting to be "passively paid" for my hobbies. But I'm expecting that someone won't steal and profit from the things I make. Why would that be fair?
So I took it, and I put it in my pile of completed works: a pile of crumbling statute rubble by the roadside. In the digital case, maybe it was posted online and the pile is a timeline or portfolio.
Someone in a pick up truck drives by sees it, takes it, and sells it for half $1 million to a trust fund baby.
Was the output of my work and therefore the half $1 million stolen from me?
If there was nothing physical to take, and I had never tried to or successfully sold it to anyone and somebody else does it, was I stolen from or did I just fail to sell?
And then if I get my knickers in a twist over that sale I have to ask myself: is my hobby to be a sales person and to sell art or is my hobby to be an artist and make art?
From what I can tell, the million dollars does not belong to me, but the person who stole my statue should be held accountable for stealing it, and they should be held accountable for selling an object that did not belong to them. Both of those things should be illegal.
Your analogy seems besides the point, though. In my original question, I specifically mentioned that the art piece was made for fun. Sometimes, as an artist, I make things just for fun, with no intention to ever sell them. Other people should not be able to take the things I make and sell them without my permission, or without some sort of deal beind struck between me and the seller. A society where it's legal to take another artist's work and sell it without their permission would be supremely unfair. A society for vultures.