I think those situations are slightly different because with those groups (and I would throw Demadonna in there) the group coaches are all part of the "organization". Bol was/is coached by Rinaldi who doesn't really have any affiliation with James, he also would have athletes that were with Bideau, Stubbs, any other agent etc. There are though a few very insular groups where it's all kind of housed under the same umbrella.
Look think about it this way, it actually makes a lot of sense if some sh-t is going on with an athlete, that someone in the athletes circle (coach, agent, PT etc) either legit doesn't know what's going on or deliberately just "hears and sees no evil" and therefore can "speak" no evil, right? If everyone has explicit knowledge then there will almost certainly be a crack or some connecting evidence to complicity. So think about it, if Templeton "doesn't know" he can come out defend his guy and make statements and technically he's not lying.
Now that's not to say these guys aren't stupid - you don't have to be much of a genius to see what's going on when a guy goes from 3.42 to 3.35 or from mid tier international performer to World and Olympic finalist out of nowhere. But these are two different things.