What you are saying is that UML is not really visual but rather a kind of text. This got me thinking. The text I am writing here is also on one level just text

What you are saying is that UML is not really visual but rather a kind of text. This got me thinking. The text I am writing here is also on one level just text - but I see it as a visual representation of black dots on a white background. But I think the point of diagrams is to be really visual and of text to be text.