I think that partially depends on your lifestyle. We never have visitors. 1 dog bit the UPS guys a couple years back. Different dog jumped at the amazon girl when she tried to step out the van.
If you are the type that entertains friends and has strangers over all the time i could see a dog not being as aggressive. Ours bark the second someone is at the front gate. We encourage it and say good boy after we walk up to grab the package.
Every now and then a kid will have a friend over and its kind of a pain. Telling the dog over and over its ok. The barking gets annoying.
Also i dont think a lot of folks who leave for work realize how loud their dogs are during the day. I work construction and it happens all the time where a neighbor dog just wont shut the heck up. Sometimes the neighbor is home!!! People like that are kind of rude in my book. Would not be fun living next to a yapping dog. You at least hope to hear the owner saying to be quiet from time to time. Bad dogs are usually the result of not getting love and attention at home.