Here is a good reason - IMO- why leaf litter needs to be boiled prior to use.
Here is a little pile of assorted debris from one bag of leaf litter.
The seeds are cool, but most have insect holes ----> just think of the possible infestation(s) in an enclosure
There's even a bonus ----a bird's feather! Yikes... that's doesn't have any nasty bugs !!

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above -- it dries out very nicely.

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Boiling for a few minutes may not get rid of all the nasty 'extras' .... but it will certainly help.