It can be just that single people don't give two shits about the switch
Like 72% of the people with the switch has a household with 2 or more people.
In the those households + single people that live alone = the people in the house who most wanted the switch was a guy 90% of the time.
This does not mean that women didn't wanted the switch.
Hell, it is completly possible that of the people with 3 or 4 people playing in the household there are more women than men.
Women could just be "dude the joycons are giving problem, wait for a new batch and/or we need more games confirmed before we buy" like lots of people on gaf and the guys were like "new console at launch ! what could go wrong" which is the classic idea that we have better memory than men =P
Think it's more likely that yes, hardcore console gamers who buy consoles at launch are more likely to be male than general console gamers. Although I do agree that just because the main Switch consumer in households tends to be male, that doesn't mean that there aren't female Switch gamers in the house. So the statistic is a bit awkward.
Don't think that's a "memory" thing. Think it is a "guys are more likely to be extra enthusiastic about the newest and hottest games and consoles" thing, which, well, you could chalk up to gender expectations alongside interests imo. I bet it is much more natural for a man to see himself as the sort to be a launch console consumer than a woman.
Also Nintendo didn't really lead with the titles that drive women to its systems. We'll see what happens when the wider audience games start hitting the system, when the system is more available, etc. I bet Nintendo will do better with women than the console competition (percentage-wise, not total consumer-wise, perhaps, pending Switch sales).
...
Still 90-10 looks ridiculous and honestly not what I'd expect. Wouldn't have been surprised with like 75-25 probably though.