Some people are so full of themselves that they don't even realize how crass they might come across.
An appropriately ironic comment, given that you just arrogantly belittled someone while also accusing them of narcissism, despite the author plainly writing that they don't claim any of the ideas are good. Next time RTFA before spouting inflammatory nonsense.
"I'd rather give my ideas away than let them go to waste. Who knows if they are even good? The hard part is the execution anyway."
So in this case, RTFA becomes really important and not some "silly chant." Because instead of reacting to what they actually wrote, you've instead concocted a story about this person in your head, and then attempted to belittle them for it.
I challenge you to quote any line from the article where the author says anything remotely "full of themselves" or "crass." You won't be able to do it, because it doesn't exist, and you're just being shamefully inflammatory for no reason.