Most of what an inspector is looking for are safety issues and code issues. The lenders are the ones I would be most worried about, they will pick apart things as simple as peeling paint even on homes built after 1978.
As a seller it is best for the inspector to find things that could cause harm or financial loss for the new owner. For example if the home inspector overlooks the GFCI in the bathroom not wired correctly and the house catches fire. Guess who would be in a lawsuit. That right, the inspector and possibly you the seller. No matter what the inspector finds the safety issues are the best things for any seller to agree to repair, keeps your pockets full and your conscience clear in my opinon. On another note a home inspection is not like a vehicle inspection where it will pass or fail. It is for the new owners to know what they have to fix or what they should be aware of as far as safety, structure and hazards. if the company is just making things up though, I have never had an inspector do that and I would know if they did because I read the building codes book all the time to keep my clients safe.