That is correct. If you have a bunch of trunks in up/down state, how do you know when a redundant trunk has failed? I find it difficult to track failed trunk ports in a redundant network without some mechanism.
There are at least two mechanisms:
1. Administratively shutdown any unused trunk port. If it is configured as a trunk, shouldn't it be up/up? Perhaps it is easy to just leave the interface in up/down state, but then it is difficult to track which ports should be up/up.
2. You could use a tag on the interface description and only alert on trunk ports that have a tag that means that it is an important link.
If you don't care about this issue, then suppress it.