I also find it inconvenient to unlock my car, apartment etc. before I can open the door. If companies were selling doors that were 99% secure even without that inconvenience, they might not even be lying explicitly.

The difference for software being marketed like that is that most of its users do not have the knowledge to (in-)validate such claims, so some will believe it. Consequently, some of them lose various amounts of money due to lacking security. Some others don't, so all is fine.