There have always been walled garden software platforms. Nintendo is a very successful example from the Commodore/Atari era.
This is the problem, there really isn’t a coherent threshold between switch and iPhone or a reason console vendors shouldn’t be equally considered general purpose devices other than marketing. You could plug in some usb peripherals and run office suites on a PlayStation just fine.
No, nobody buys a nintendo to do banking on them. I bought a phone since I needed it to do banking. This is a real difference, not just a marketing distinction.
> it’s purely a result of gatekeeper decisions on the part of Nintendo
Yes, and that gatekeeper power ensures Nintendo isn't a general purpose device. If they allowed it to be a general purpose device like Apple did with phones then things would be different.
Controlling such a major share of general purpose devices like Apple does is a serious issue. Controlling a share of gaming computing like Nintendo doesn't matter nearly as much, so therefore lawmakers aren't going after them to the same degree. It doesn't matter if technically they are the same, in practice one doesn't cause issues for society while the other one does.