Apple will deploy the same security/ privacy / ease of use /packaging strategy they have done for every other product.

Same reason developers continue to use Apple payments even when they have to shell out 30% of the revenue.

I can see Apple, setting App store rules around declaring AI usage, or could start labeling apps not using their models with strong language designed to amplify the increasing user concerns around AI and so on.

The product strategy has to be better the product itself does not have to be objectively better for the developer for them to have to choose it.