The author addressed that, above the pie chart.

> "As in previous year, I don’t break out the actual dollar figures for my work."

> "It’s something I’m thinking about detailing in the future, but that taboo is still tough for me to overcome."

It doesn't seem to reduce the value to the reader, though I haven't read the entire article yet.

"However, even that gross figure is still well under six figures."

This helps, but still doesn't really help the reader know if it's enough to cover individual expenses or family expenses. I assume enough to be self-employed but definitely agree that ballpark numbers would provide the reader much more value like David Kadavy's Income reports:

https://kadavy.net/blog/posts/november-2021-income-report/