Presentation is everything. When users see a beautiful user interface, they feel intuitively that the software is valuable and of high quality and can be trusted. Same thing goes the other way - poorly presented user interfaces lead to user distrust and disinterest.
Same thing goes for your workplace whiteboard diagrams and written text - if you draw and write poorly on the board then your message will not be received well by the audience, they will be less likely to trust what is written, and will be less likely to be persuaded by whatever is being communicated on the board.
Whiteboard diagramming and text is increasingly important in establishing your professionalism, and critical in your ability to persuade in the workplace.
Would you pay for a course that teaches you how to improve your whiteboard writing and diagramming skills so you can effectively present well, draw beautiful whiteboard diagrams and persuade others? To draw attractive and interesting flowcharts, software stacks, network diagrams, architectures and text & fonts that surprise and delight your audience.