There aren’t incorrect vocab words in the sense that they ARE correct. It’s just that some of the vocab is outdated? I remember a thread a while back talking about this issue with 里心. Like that reddit user said, the vocab is just stuff no one says anymore. But it’s not wrong. (And dammit I was sniped)
Wanikani uses vocabulary to drill the kanji into your head, and pretty much only for that purpose, so you will need to supplement your vocabulary with outside sources for sure.