It's obfuscation.
Ticket prices didn't go down when they rolled Genie+ out, they went up, anyway.
But when discussing annual price increases and comparing it to any other year, it doesn't seem as bad since that $15 price increase became "optional".
If you're of the mind that modern domestic Disney parks can't be done without some sort of fastpass-like system, that price increase on top of ticket price increases has now grown to as much as $35 but in mainstream discussion about ticket prices, especially historical increases, the ticket price will still be just the ticket price so it'll look like just a 5 or 6% annual increase or whatever, masking that in reality, it's more like a 15-20% annual increase in recent years when you factor back in what was taken out and how it has been going up in price right along side those ticket prices.
It used to be only cell phone carriers and cable companies that did business this way.