Not sure where you got this information - we had two at our old house and had nests in them all the time. Some squirrels and raccoons would even eat the fruit. The corollary to it not playing host to insects is that it's impervious to nearly every type of insect or disease. I think there is one type of fungus it's susceptible to, but it's pretty rare, even in it's native habitat. This is a byproduct of it's longevity - it's considered a living fossil, having not evolved significantly over the course of several million years.
It's relatively slow-growing, sturdy, and can live a LONG time. The only real downside is the relatively smelly fruit the females drop. Overall a great landscape tree to add to a city's mix.
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