How can the "image be consistent" when the majority of their own buyer base is adult?
The image is outdated, and really it's old school PS/XB fans who are behind the curve this time.
It's not 2001 anymore ... Nintendo's audience is not the GameCube/GBA audience anymore ... well it is but they are 24-30 years old now, not 8 years old anymore and they're buying a lot of Switch consoles.
Again look at the US demographic image again
The largest Switch audience are 25-34 year olds in the US, that is the generation that were kids when the N64 was towards the end of its life cycle and the GameCube/GBA era was starting.