When my mother was shopping for a new smartphone she definitely was not considering whether or not she could install a different OS on it.

Your mother's unwillingness to install a different OS doesn't mean that everyone else who wants it should be denied too.

I'm genuinely curious. What's your motivation in making up such a pointless argument/justification?

cool, When i was shopping for a new car i wasn't considering if it was a 4x4 because i live in a city with a mild climate