Before the pandemic, I had to replace my outside AC unit. I got three different quotes, each of which suggesting three different required changes, from electric

Before the pandemic, I had to replace my outside AC unit. I got three different quotes, each of which suggesting three different required changes, from electrical to new duct work. I asked the first quoter about all the other work #2 and #3 suggested and he scoffed at it and said he did not want to keep his guys working in my attic one second longer than necessary in the August heat and that the electrical work was completely unnecessary. Similar to dentistry, they're doing something useful but it's hard to know how much of it is actually valuable