Yeah, that's true, but that's for "big" trees that have limbs
cut, then are ignored and "never" looked at again.

As a Cornellian, I was taught that trees healed better if one left
them alone. However, preserving a jin is different than lopping off a
limb. In general, an exposed jin is not an entryway to disease,
although it's a good idea to limit jin to species that have dead wood
in nature. People who jin figs are just asking for trouble.

We, on the other hand, are constantly examining our trees and
pampering them and will/would/should notice those nasty thingies
if, perchance, we sealed one in. ;-)

I have these Nepalese statues that have been in my possession for over
TWO YEARS. Then they began to have sawdust eruptions. Amazingly,
they were infested with powderpost beetles, which can survive as larva
in dry treated wood for two years or more.

I bagged the carvings and killed the beetles as they emerged. I think
the little exit holes just add charm to the statues.