I always hated that event, not because it makes slavery bad, but because slavery vs not is a false choice with or without it existing. Thus good players get punished at random for playing well, potentially significantly. Though one of my most memorable bad event spots was 3x first fire early on without hut money lol.
I wonder what would happen if Kossin or Duckweed would bother with HoF format. Or Snaaty leave his Deity AW games for a moment.
Would that page look the same?
It probably wouldn't look much different. Players optimize for what they're doing. Quite a few of the HoF top contenders are capable deity players. For example wastintime's score optimization is not something Snaaty would know offhand, and is sufficiently micro intensive that it would be very difficult even for other elite players to match. Keep in mind, also, that it is the HoF players that discovered culture wins using espionage as a generator, specifically because the driving factor was turn finish date in an optimized setting, not victory in a difficult setting.
It was similar when looking at how Lord_Parkin wound up losing some of the games he played with the polycast group back then, despite being a significantly stronger player than me (and the others, who I was ahead of as well) in SP as well as PBEM/Pitboss competitive MP. The reasons? Blazing turn timer cut into his micro and a couple surprise military attacks (in a particularly memorable 3v3v3v3 team FFA, his team was running away before ours pulled a cheeky astro bulb and surprise-attacked/razed 75% of their coastal cities on the turn we declared war, resulting in an instant resignation). One game that kind of thing happens, another he's 10 techs up on me and I can't do anything about it, yet another his invasion stack gets overwhelmed by pure HA (not enough spear) and then his metal is cut before he can build more. Back and forth it went, but in terms of average empire strength he was no question better, despite the losses.
Some of the deity players have enough stored micro heuristic to handle blazing timers without too much dropoff (Obsolete did, Rusten probably could), but not everyone, and in most formats it's irrelevant.
For pure SP victory skill, the best measure is probably XOTM, while S&T games and HoF give different perspectives and have different (but related) skillsets required to perform well.