Example, you take the city bus.. the surface inside the bus is less likely to be contagious if everybody wear a mask.
Do you really think cleaning with soap is perfect? To perfectly clean inside a bus takes hours. You know how detailling work... Would the city pay hours just to clean inside a bus perfectly every day. Nah, they just pay enough to make it look good enough.
Some people might use a laptop or cellphone inside it & spread it everywhere. The junk that is present for only 10min is decent enough to stop the spread by a massive margin rather than a large junk that stay on object for hours. 5 star chief michelin doesn't even clean his hands, so I don't expect anybody to be able to have a proper sanitary handling, because they feel too important.
You also have the kids who touch EVERYTHING.
Skip to 4:23
https://www.youtube.com/watch?v=0Tp0zB904Mc