I was about to link to the sive.rs post, but OP already beat me to it :) It's a really good framework for those who haven't seen it before.
Ideas can be quite useful on their own! Good ideas can make better ideas. And mental models are usually useful without execution.
But I think "Brilliant Ideas" can be dangerous without execution. I think Brilliant Ideas without execution can trick you into thinking you're much smarter than you actually are.