Can we take a moment to appreciate the irony of decrying platform lock-in when talking about the company that successfully launched a new gaming console against... Nintendo and Sony?
The fact someone else did something is an absurd justification to do it as well. In a practical level, Xbox is much more locked in than Nintendo, as all Nintendo consoles have PC emulators for it and the devices can be jailbroken.
It's not absurd: it's literally proof of a viable and sustainable business model.
Consoles have always been packaged, standardized, and locked computers. That Nintendo is bad at security isn't proof of any great altruism. It just means they're not good at secure hardware design.
Except they weren't -- until Nintendo came along with their 10NES lockout chip.
Actually Texas Instruments had a go at it with their beige TI-99/4A, but by the time that came out most of the TI-99/4As that would ever be sold were already sold, without the lockout. But it was the NES that turned the locked box into a business model.
