Look man, even plumbing estimates are usually way off - but they know how long it takes to hook up two pipes that are 30' long for your new bathroom. They don't

Look man, even plumbing estimates are usually way off - but they know how long it takes to hook up two pipes that are 30' long for your new bathroom. They don't need to have meetings about it during the process. They don't need to talk to Home Depot about integrating with their broken API.