I’m all for people who are sort of “jack of all trades”.
They offer a great service for those of us who aren’t very mechanical or just lack the time to get projects done.
In fact, my wife and I have had some of the best work done around our house by handy men types. There is one lady who seems to know how to do just about anything. We hired her to finally make some sense of the master bedroom closet. She was really cool. This lady took one look at our closet and said, “First, never share a closet”. But then, she was able to organize in such a way that both my wife and I could utilize the space. She was so good that when our HVAC went down, she was the first one we called. To her credit, she demurred immediately. Our handy lady told me to simply call a licensed HVAC company. She said doing anything else is simply foolhardy. So, I did just what she said. I phoned the HVAC company to service our heating and cooling system. Our handy lady was right, these HVAC technicians really know what they’re talking about. I told the HVAC tech how curious I was about the inner workings of the HVAC unit. He told me it would be fine if I’d like to watch the repair and he would narrate as he went along. This turned out to be awesome. I had no idea how the HVAC unit actually worked. More to the point, I had no idea how much these HVAC techs have to know to do their job. He also showed me all the stuff I could do to help maintain my HVAC system.