It's almost like you're noticing this because the media is playing up layoff reports in tech.
To quote... you - "4000 seems like a tiny number in context of total headcount, and when you take into account that they've somehow lost more than 5 times as many in the past year."
They've reduced staff by 5 times this amount over the last 24 months, but this is the reduction that you think is for the sake of appearances... I wonder if that's because this is the one getting media attention...?