In a pre-digital pre-social media world you’re right. But in the modern world where people spend more time socializing online than in meatspace, digital goods become easier to display than physical ones.
I think a lot of HN doesn’t get this because they don’t spend much time on social media. But for someone like Steph Curry, putting an ape in his profile pic gets a lot more exposure than a Van Gogh on his living room wall.