No one comments on the plumbing or electricity of a building unless the toilet is clogged or the lights aren't working. Then all of a sudden, pipes and wires are a hot topic of conversation.
Similarly, people don't compliment or even critique information architecture unless it's broken.
The "information architecture part" is almost invisible when separated from how something looks and how it's made. For example, we can't evaluate the quality of the structure of this eBook without considering how it was written, edited, designed, illustrated, typeset, marketed and delivered.
If you practice information architecture for the glory, get ready to be disappointed.
But if you practice it for the clarity it can bring, get ready for some seriously interesting work.