You are the one who is big on authorities.What do mean by "real" epidemiogist?
The sort of problems you are discussing are problems that any serious person, and even many casual people know. While they seem like complex concepts to you, to epidemiologists they are trivial. No one is making the errors you assume are being made.
Why is it that you are always demanding quotes from authorities, while you also assume the authorities cannot get simple stuff right? Do you really think the supposed issues you raised are things only you are aware of? Everyone knows about confounding varuables, and real epidemiologists are not going to just ingnore such. When they say that someything increases the risk of something, it means the risk is increased taking into account confounding variables.