No Need to Greet Visitors
When workers and first time visitors are at your house and you cannot keep your attention on your dog, the safest place for your dog is in his/her crate / behind a secure baby gate.
People do silly and unpredictable things. They leave gates open, move too fast, make unfamiliar noises, etc.
Not everyone likes dogs and I’d just rather keep the dog protected from any risk.
Your dog may be uncomfortable, even if they never have been before.
If we know where the dog is and the dog and others are less stressed, everyone is happier in the experience.
Why risk it?