Exactly: that's what the author of the piece is doing. He's had bad luck with a certain type of person while having much better luck with other types of people, and he's analyzing the reasons for that.

Sounds like a rationalization for a gap in management capabilities. Much easier to find fault in tall people or people that talk fast.

An insightful business owner will review their own psychology first and ask others for their impression in a way that doesn't reveal their bias.