What is the main reason the attitudes are more often revealed in spoken rather than written language?

Attitudes are easier to read when someone is speaking because more factors are being played out in person than in a written language. When someone is speaking you can hear their tone and inflections on certain Words. You see their facial movement and expressions and even their body language can tell you how they are feeling. Compared to Words that are written it is hard to distinguish the mood without these tells. For example: The phrase "I never said she stole my money" has 7 different meanings depending which Word you stress. When reading it, that gives you the confusing job of trying to figure how exactly the person feels while writing it. As opposed to if someone was saying the phrase then you would know the first time what they meant because they would say it how they mean it.