Earlier quoted context omitted.
Oh I absolutely agree. Like another commenter said below, another similar thing are payment processors fees, but it works because 1. you're free to use another one, or checks, or cash, or bitcoin, or anything else, and 2. the EU has strongly regulated their fees and imposed massive limits on what they can charge in %.
But are they similar? One could argue that Visa and PayPal have a monopoly on payments processed via the Visa network/PayPal credit. Consumers are free to choose another ecosystem, but if they don't, the business is forced to make business with them. Similarly, the consumer can choose to buy an Android (or have to phones/tablets), but if they choose Apple only, the business needs to work with Apple.
Also, the EU regulations cap the fees and set up identical rules for everyone (unlike Apple where its own services are left through without a second thought even though they don't necessarily operate to the code).