TLO seems to have a longer tail than AlphaStar in that graph though, so doesn't that imply that TLO peaked at an even higher APM, presumably during battles?
TLO is a Zerg player, so he probably does a lot more errors when playing Protoss. Also, every top player estimates when to do a sequence of actions and spams it a few times to maximize the chance of execution. Meanwhile Alphastar only has to do that once.
Fair point about humans needing minor adjustments though. Another comment also mentioned a bug in the APM measurement: https://news.ycombinator.com/item?id=18994350