A single ticket to an NBA playoff game ranges from about $150 to over $5,000 (back when you could go).
You can see the game for effectively free at home, with better commentary, exactly the snacks you want and all of that.
A night at the symphony or opera starts--starts--at $50 a ticket, and can go to $1500 easily. After the show is over, it's over, and all you have is a memory.
Good seats at a popular rock concert are easily $250. You can get the mp3 for next to nothing, and it will be a better recording too.
Even just a movie these days starts at almost $20.
And yet people still fork out the money. It isn't just the show itself that they are paying for, it is the entire experience. The interaction, being part of the crowd, a crowd. Many things.
The value captured by an entertainment here isn't just the bits of the picture.
And I say this as someone who would never, ever pay for the content I know of on only fans. But I have sunk a lot of money into the other things on the above list.