Just depends on the inspector. The important thing is to be up front with the client, especially in the report. If you could not, or did not, or would not inspect anything, document what you didn't inspect and why.
Some inspectors will, as a matter of pride, even, get to every corner of every attic that is physically possible to reach. I know inspectors that will, when they reach those corners, leave a business card.
Others will take one look from the access and say "no way I'm going in there" and document it. Same thing with some crawl spaces, some roofs, etc.
By the way, was there a fire? Kinda looks like it.