This is a bit simplified but it’s more or less what you need to understand.
Generally speaking, as prices rise, demand drops. So let’s say you can sell 1 copy of your book if you charge $500, but if you lower the price to $50, you can sell 100 copies. Which price would you pick? Well, it depends on your (marginal) costs. If the cost of printing the book is $5/copy, then in scenario 1 you sell 1 copy and have a marginal profit of $495. In scenario 2, you sell 100 copies and have a marginal profit of $50*100 - $5*$100, which is $4,500. So most of us would prefer scenario 2. IF we’re at $50, raising prices to $500 won’t be smart — we’ll lose more money even though our prices are higher.
What if you also need to pay a guy to ship the books and no matter how many books you sell, he’s going to charge you $100. He’s not a marginal cost. In scenario 1, your profit would drop from $495 to $395, and in scenario 2, your profit would drop from $4,500 to $4,400. But it doesn’t change the optimal price.
I picked $50 and $500 to make the point, but the same holds with $50 and, say $60. if $50 sells the optimal amount, then $60 is too high. And it remains too high even if your fixed costs grow from, say, $100 to $200.
Ok, so now imagine you’re running a baseball team (or whatever you want to use as your fantasy sports ownership scenario). Your payroll is $100 million. Paying your baseball stars costs you $100 million if you sell 1 ticket or if you sell 1 million. There is an optimal ticket price that maximizes the profit from selling tickets, but it is more-or-less unrelated to the cost of paying your baseball players because the marginal profit per ticket doesn’t change when your payroll changes. Unless your players get a share of each ticket sale, the cost of those players does not change your marginal profit per ticket and so does not change the optimal price of the ticket.
If you have a team now and you are paying each player $25,000 per year and your team has, say, ticket prices of $50 each,and you picked $50 because that was the best price to charge, if suddenly you double the pay of the player to $50,000 per year, your profits will drop b/c your fixed costs go up, but $50 remains the optimum price. If you raise prices above $50, fewer people will buy tickets. If $50 was optimal before, $60 wasn’t then and isn’t now. Picking $60 now will lower your profit even further.
Honest — this really isn’t disputed. If price x is optimal, changing costs unrelated to the number of units sold is not going to change the optimal price or quantity. (there is one exception, related to going out of business entirely, but that’s a story for different day).