Yes, expressing a causal structure is pretty easy (e.g. make a Bayes net). The hard part is inferring a causal structure from a statistical pile of observations

Yes, expressing a causal structure is pretty easy (e.g. make a Bayes net). The hard part is inferring a causal structure from a statistical pile of observations. According to Pearl, many statisticians even flatly reject[ed] the notion of causality as just a convenient fiction (iirc; it's been a long time since I read it).