>You wouldn't call Nintendo a monopolist because they dictate the rules of the Switch, would you?
It's not monopolistic, but it's another kind of problem. Locked down ecosystems and companies that actively work to stop any kind of unauthorized access to their locked down systems are stifling innovation and creativity to a degree in exchange for a somewhat false sense of security and the larger motive of control and continuous profit off their products.
Whether this is good or bad sort of depends on what you value more.
It also does push back a certain type of customer, whether companies want these customers or not is a different story but, personally I would never buy an apple product because of the way their ecosystem is. As for the switch, I was pretty unexcited about it until I seen the videos of a working linux install on it, my excitement lessened when I read Nintendo intended to release hardware and software updates to fix the exploits that allowed that.
But this is just me, though I can't be the only one that feels this way, and again there's a good chance neither Apple nor Nintendo would want my business anyway.