Yeah, but the definition of certified is pretty subjective. Also, even if instead of certificates they gave out shiny stickers that said ‘Trained in roof cleaning by Shinglepants Mcgillicutty’, it would be the same dillema… the ‘non-trained’ against the ‘trained’.
It’s a tricky thing to resolve, but i hear what you are saying… a person that is ‘certified’ is often perceived as being more capable than someone who has many years of good work and satisfied customers behind them… which is often not the case.
P.S. It’s cool to argue, but dont let that doofus rattle you. We are only 3 days into the new year… gotta choose the battles wisely, so the knickers last all year without getting all wadded up too bad.