Because problems that affect your property aren't always obvious to those without the right training and experience.

     I have performed over 4,500 inspections in the last 10 years, with the last few years seeing numbers of over 500 per year.   I have grown up in the business of construction and feel that there is not much that will escape my detection.  With that being said, I know there are many more inspectors out there that have shown up in the last year when the market was so crazy.   With option periods and daylight, it limits how many inspections ( performed right!!! ) that can be done.   I like to do 2 in a day.  I will do as many as 3 in a day with reports to follow the next day.   I do not skip steps because I'm in a hurry and if anyone knows me, I will talk to a buyer for as long as they need.   I prefer to have reports out the next day again when I'm not in a hurry.  I will sit down in front of my computer with a cup of coffee and write a report appropriately.   If others say they can get report out after inspection, then you will get a fast report.  That doesn't make it a good report. I do take as many as 300 or more pictures on any given job and will use them in my reports.   I have catered my reports for the buyers to understand and not like the newer fancy inspection software out now that makes the work easier for the inspector.  If I wanted easy I would take a few dozen pictures instead of a few hundred.  I like to show things working in home ...  or not working with confirmation that I did put hands on everything in home.  It is more for confirmation of putting the buyers at ease that I actually did walk roof,  get into the attic, and under the home.  
     I think experience certainly matters and not the price.  My analogy is that I was a paramedic and fire fighter for over 25 years.  I have been in hundreds of house fires and on thousands of ems calls.   I had the same certificate or patch as a newly-hired medic and fireman but we absolutely were not the same.  I feel that inspections are the same way.  I see past the new paint, new floors , and look for possible issues that might show later or give confirmation that work was done right.