This was mostly born out of counter signalling the businesses that valued serious people over competent people in the 20th century.
But, like with all things, the pendulum has swung too far in the opposite direction. I believe the next wave of tech countersignalling will be people who actually do take themselves seriously, maybe even dress in suits, etc..
also you're fired
No matter what he wrote, it was going to be insulting.
Maybe he should have had AI fix up the grammar/spelling for him...