I am for real browser choice, and also for real operating system choice. You can download other photo apps and not use Siri AI if you don't want to. Not sure why you would think this is similar to the browser situation on iOS at least in the USA. I believe alternate browser engines are allowed in the EU now thanks to the DMA.
Because literally any other AI cannot have the same privileges that Siri AI. The DMA allowed actual browser choice, it can also allow real AI choice.