Instead of comparing just the ticket prices, look at the total revenue generated from the performance. If Taylor Swift can perform at a small venue and generate the same revenue as in a stadium, then it is valid to argue that her value is unchanged. Likewise if the blocksize reduces by 10x and we see a 10x increase in fees, value is preserved. I reckon blockchains should be compared based on how much transaction fees they generate. That would be a harder metric to game.