Do you have examples of that? I have a different perception, most of the EAs I've met are very grounded and sharp.
For example the most recent issue of their newsletter: https://us8.campaign-archive.com/?e=7023019c13&u=52b028e7f79...
I'm not sure where there are any “hypothetical logical thought exercises” that “end up coming to insane conclusions” in there.
For the first part where you say “not realizing that their initial conditions were highly artificial so any conclusion they reach is only of academic value” this is quite the opposite of my experience with them. They are very receptive to criticism and reconsider their point of view in reaction to that.
They are generally well-aware of the limits of data-driven initiatives and the dangers of indulging into purely abstract thinking that can lead to conclusions that indeed don't make sense.