That is because he is an art director for marketing. Art directors prefer to sketch physically or/and digitally from scratch. It is a stressful job, but you have to LOVE it with passion. He created a visual concept like you saw his Alexa sketches. What he does is a storyboard. Web developers or engineers design/code his storyboard and turn it into the webpages you see online.
You can try Alexa Echo with a screen. It's got accessibility.
We have Alexa Plus. Hubby recorded his voice and saved his voice files in my audio apps on my smartphone. I just play his voice, and Alexa responds by turning my lamp on.
I'm considering purchasing Alexa Echo with a screen.