Because Sony's financial problems aren't news. They've been present since 2000, when they had a peaked market worth of $200 billion+, and now according to Forbes they're worth less than $15 billion. Though they hemorrhaged $185 billion+ in the span of a decade, it's not news.
The WiiU failing is news. The Vita had it's phase, but it ended when it started outselling even the 3DS in a few consecutive weeks. Now it's no longer news.
There's just so much attention people will give bad news, but the problem is that gamers are PEOPLE. That's a problem, because Nintendo gamers are CHILDREN (or immature), which means they develop mentally slower.
So while Sony fans reacted with denial, and then anger, bargaining, and then (a euphemistic) depression, and FINALLY acceptance, after only a few months of bad news, a majority of Nintendo fans have been stuck on denial and anger.
So tell the average Vita fan that they have no games, and they'll say "Yeah, kinda. We have a few, but hopefully we'll get some new ones soon."
Tell the average WiiU fan (see: this thread, that thread, ANY thread) that they have no games, and they'll only react with DENIAL or ANGER,
GROW UP, NINTENDO FANS. THE 5 STAGES OF GRIEF HAS GOT YOU PEGGED.