What if the HR person or boss just like to be nitpicky and over-reactionary out of irrational fears?

Then I also think how human beings can be so irrational in making investment decisions.

Don't let the imagined fear in your mind cause you to make an irrational decision.

If I use comps and there're one or two irrational buyers in the market, it would destroy all market stats, this problem is especially more tangible in very expensive market or luxury house.Yea appraising comp is like an art, I think you get it though, but we have to model it based on different factor.

With knowledge FEAR becomes nothing more than a irrational emotion.

However, this irrational thinking could be explained by humans tendency to be loss averse.

Overload of information may lead to "analysis paralysis", whereby, you process so much information that it leads to an irrational pause in your real estate investing.Solution: Take one step at a time.

A tenant will do something irrational or even fairly disturbing. 

(Irrational Exuberance).    

I'm not saying this as someone preaching, like one's who "trade" IR rates, I've done this myself and the lack of debt, peace of mind changes your day to day lifestyle.