Yea, given how easy it was for the author of the post to find it, I would guess that literally nobody in the last decade bothered to run a profiler to see where they were spending time.

The only possible explanation is that management never made it a priority.

I could see this happening. A project/product manager thinking "We could spend $unknown hours looking for potential speedups, or we could spend $known hours implementing new features directly tied to revenue"

Which is kind of ironic since this fix would keep players playing for more time, increasing the chances that they spend more money.