When my dear brother, Michael, died just a few years ago our family looked for the naturalistic causes. Faqir didn't believe that any of these gurus were bodily or mentally perfect and felt that it was simply just desserts when the so-called Enlightened being died from throat cancer. This is a subject that is so taboo in certain shabd yoga circles that I am even surprised when I find out that so and so guru has kids. Faqir was 87 or so, I believe, at the time. Perfect masters don't.
Corrupt ones do.
However, let's back up a few steps first. The Guru is Perfect, so he must know what he is doing. Thakar Singh and his antics easily demonstrate a much worse downside. And it is exactly that downside that does NOT get discussed in the literature. God has my child's best interest in mind.