Seems like Zuckerberg had already made up his mind and needed an engineer to positively confirm his desired path through a very power imbalanced chat... No shade towards the engineer at all, but besides the very first "My instinct is” comment the engineer literally could have just been ChatGPT and Zuck would have gotten a similar convo.
if this cartoon [1] is a reliable source, then maybe it's not (or possibly didn't used to be) such a strange thing at facebook [1] https://bonkersworld.net/organizational-charts
PS: Later he worked at Twitter and commented that also: https://twittoons.com/