Not all people like to draw stuff. Some people like software developers want to write stuff.
This is why we now have native support for Mermaid, a markdown flavored syntax for building diagrams.
Mermaid diagrams are an easy way build: flowchart, sequence, class, UML, gantt and entity relationship diagrams.
Here's a short gif showing you how it's done.
You can find the full documentation of Mermaid, the markdown flavored syntax here: https://mermaid-js.github.io/mermaid/#/