I think it helps to take him at face value, serving the sharing of information he sees as valuable. Maybe it's easy to misread the phrasing as grandiose, but this hasn't changed about him for years. People recognise his name not because his side projects were insanely successful (they were quite pedestrian!) but because he wrote about them.
When he was writing about the bingo cards, I had side projects making more money for far less effort, but people knew about his while I didn't write about mine. I like to imagine the tone was (and still is) less about "Look at this amazing stuff I'm doing" and more "I'm amazed at doing this stuff."
The takeaway from his tweet likely isn't intended to be "Look how great I am" but "Here's an example of the power of writing, might be useful to consider". Presented with minimal tone, maybe people misread the intent.
When he was writing about the bingo cards, I had side projects making more money for far less effort, but people knew about his while I didn't write about mine. I like to imagine the tone was (and still is) less about "Look at this amazing stuff I'm doing" and more "I'm amazed at doing this stuff."
The takeaway from his tweet likely isn't intended to be "Look how great I am" but "Here's an example of the power of writing, might be useful to consider". Presented with minimal tone, maybe people misread the intent.