The technology is capable of defining it as clear and obvious. The rule is any part of the body which can be used to score and it was my understanding it was her foot offside, not her hand. It looks clear and obvious to me. In the offside image, there's a red line, which could be her shoulder, which also counts for offside, but the blue line behind it is the onside line and White's foot is clearly and obviously beyond it, clarified by the foot of the US player next to her.
It was never clear and obvious with refs. We could see it week after week on slo-mo replays. If we won't allow the referees the technology, then the pundits and viewers should also be denied it. Don't hold your breath for that. It must be galling for refs to have pundits determining their incompetence week after week, then dismissing the solution, too.
The time it was taking in the WWC was too long but they sped that up with some common sense. (Nobody has a problem with a game being stopped for water breaks in heat and that takes longer. We'll see a lot more of that as the temps ramp up globally.) I doubt it was that they just weren't using VAR but it was being done in the background without bothering the ref until they had to. That makes more sense than any argument I've heard against it.
I keep going back to that Thierry Henry handball that kept Ireland out of the World Cup and wonder how long critics of VAR would've been happy to wait if it were their country. "However long it took" would be my guess. We'd never hear a pundit or fan saying, "Taking too long, get on with it, we're not qualifying, end of."
No doubt the use of referees took a while to evolve and VAR should be given time, too.