Most likely she was fixated on dealing with LE, not being in a position to need to deal with Jade specifically. My best guess is it just didn't occur to her. We're still dealing with a bunch of teenagers, here. "Why didn't she just do X, that'd solve all their problems" isn't exactly a sound argument in any type of fiction.
Eh, I wouldn't generalise like that. I agree it is rarely a constructive argument, because the out-of-story answer is usually "The author didn't want to tell that story and neglected to include a solid excuse". It can be a legit flaw though, I think.
Yes, people make sub-optimal choices all the time. They don't think things through or are underinformed or act impulsively or are stuck in their ways or have thousands of other reasons. Characters, invariably trying hard to be people, will make bad choices too.
But characters, like people, have goals and problems, and they try to achieve the former and solve the latter. If they don't, or if they severly underperform, I'd like some solid reasoning for that. A Present-day Audience
that's my nickname for myself has many arbitrary demands towards a story, one being the character's actions being understandable and consistent.
But of course my arguments are vain and probably invalid because I'm hanging on to a certain fallacy: I want to see Homestuck as a huge Rube-Goldberg-Machine of Checkovian fireworks, clunky vidya game mechanics, arcane information, and time-travel, kind of a puzzle, but on fire & crack cocaine. Not so much as a nihilistic piece about the uselessness of teenagers, with some slice of life lmaos and centering on the coming of age of Awesome McSerket. The Machine has to face questions the like of "WHY DIDN'T THEY CAPTCHALOGUE THE SPACE SHIP"; the Farce, absolutely not.
Entirely my fault, really. Let's talk about shipping instead. What is shipping "high" today? Is Dave/dave still going strong? What about Dave/dave/dave? Is Dirkjake still very sad and tragic?