In Anakin's case I think the doctrine was actually what tipped him over the edge alongside being manipulated by Palpatine. The Jedi order basically strove to bring justice without discrimination, and strong emotional ties like love sway judgement of what's important. There's also anger that can come as a result of those ties which leads to the Dark side; as such they labeled it taboo, but that law became the source of his angst which is really kinda edgy-teen-hipster level ironic if you think about it. I still don't entirely get it, though. There seem to be a good number of cases in canon and the EU where a master or student flies off the handle, at least temporarily, in response to the other being hurt or killed in combat. If you're gonna have that kind of problem regardless might as well let them at least have kids or get married and strengthen the order's next generation.

If he received training from Yoda, he already knows a great deal about the Order (excluding expanded universe of course)

I heard about that, but never read the series with those events.