Ideas may be dime a dozen but good ones are not
That's another one I see pretty frequently but which doesn't seem to actually be backed up by much actual evidence. There are loads of really good ideas out there presented by people with no ability to actually implement them, and many of the lesser ideas could easily be refined into good ideas in the hands of people with a good understanding of practical limitations.
Sure, you absolutely need an idea to produce a good product, and some ideas are better than others, but in the end there are a huge wealth of ideas -- most of them with plenty of potential -- floating around out there, and it's only those who are able to successfully execute them who bring quality products to market.
We may be seeing this frequently probably partly due to Dunning-Krugerish effect leading us to see no one saying "This is my terrible/mediocre idea, but I will stick to it".
Btw, not sure of page but we are on the same chapter at least, by saying good idea, I refer to business, limitations etc aspects as well. More you know and are aware, less D-K effect and delusion involves.
So, "Ideas are dime a dozen" sounds like coal and diamond are same when in the soil (carbon) , but you can polish diamond easier when its in your hands. And also there is no need to shout "hey , look a diamond" before somehow closing Not every ideas have high entrance barriers keeping other out or amazing USPs.