This Old #%&@*$ House

T-Prime wrote:

I wonder if the reason for that is regional, and/or related to licensing and certification?

Probably both. There are some limit on what an inspector can do too. Mine said upfront he won't try to estimate repair costs for problems because he's not allowed to really look into what's causing it. He can visually inspect and turn things on or off but that's it. Something that might look like an easy fix could turn into a huge problem if there were other underlying issues.
We went with one recommended by our realtor, but she was our realtor, not the sellers. We'd been looking at houses with her for over 6 months, so at that points we trusted her opinion and never felt like she'd recommend a hack just to make a sale.

Our inspector was totally useless this time around. We used the one suggested by our realtor and the one question I asked him to check, "Is the plumbing CPVC or Pex?" came back as, "Pex" so I thought we were good. Nope! Turns out he only looked in one of the bathrooms and saw Pex sticking out and said it was good.

A simple look in the walk-in attic and I saw it was all CPVC...

A hundred other simple things were missed, too.

The inspector we used for the house before this one was great, though. He found a bunch of things that needed to be changed, flagged all the outlets that were switched and put color-coded tags to their corresponding switch!

Crazy difference!

Inspectors are just a slightly different flavor of contractors.

Some are crap, some are amazing and as with any tradespeople, canvas your local friends for personal recommendations.

Yeah I should have mentioned the two opposite experiences I had were for houses in the same neighborhood. We just moved to a larger house in the same development.

Being in real estate and seeing a recent inspection come back that comes to mind. Some inspectors do know electrical. But most inspectors are out there to find as many things as possible to make it look like they are earning your money. In the 4 inspections I've seen in the last year, they were all 40-80 pages long, and contained everything from sticky drawers to structural and electrical issues, albeit with some general fluff, and sometimes a bit of repetition.