@Gte How can they be dominating a market when the iPhone has around 25% market share in Europe?
There are clear advantages to having tight integration. It seems to me some consumers prefer those advantages, about a quarter of European users in fact. For the 75% of consumers who want things other than tight integration there are a plethora of other choices.
In my view the DMA is removing choice from consumers, forcing all European consumers to buy android-like products and denying them the opportunity to choose the advantages tight integration offers.