Well, not so much a conspiracy, but Israel is employing social media propaganda, similiar to the infamous russian “troll factories”. It was often very well noticeable on reddit, as sometimes two different accounts posted the exact same comment with pro Israeli talking points. Their main target is facebook and other large plattforms though.
90 weeks is more like 20 month and i could calculate that off of my head by knowing that a year has 52 weeks. I would have struggled more with days.
You could make this criticism about any date metric that it gets more or less easy to translate into a different metric.
Weeks are perfectly fine and most commonly used in the business context.