Unless you built your house yourself, you should expect the construction company to be responsible for verifying the identities of anyone entering your house. Asking for a passport and a one time payment, just in case the person who rings the bell may not be a friend.
That should be proactively helping you in case you're a vulnerable homeowner. Not checking in on every visitor would be evil, no?
I can't think of a better approach.
But we, owners, collectively choose that. We choose the security company, we pay then, we can vote them out. Most importantly: the construction company has zero say in this.
Also, no one actually check the IDs of my friends, and they don't have to pay the construction company when they first come.
I give the codes, they ring, I open. I hire a company to monitor the building but I can kick then out any day.
I own the place, you see?
That doesn't necessarily preclude helping the user to notice when they're doing something dangerous, but a waiting period before the computer becomes general-purpose seems pretty extreme.