Zero to One by Peter Thiel basically implies this with his "Competition is for suckers, monopoly is where it is at". Yet how many businesses and tech companies get founded doing the same think everyone else is doing (or at least half a dozen competitors)?
Truly novel ideas, truly thinking outside the box, truly seeing possibilities that aren't in existence is HARD. Extremely hard. I can understand why the idea that ideas without implementation is meaningless became so prominent, but that is mainly because most of the ideas people have have been had by 1000 other people so if you arne't implementing they aren't of any use.
Whereas ideas that are truly novel are still extremely valuable because it gives all the hard workers something worthwhile to shoot for (as opposed to yet another social media app).
As an example think of blockchain. Fairly basic from a techincal or implementation sense, it is the idea that was really novel. Even if Bitcoin hadn't been made, the idea itself is enormously valuable. There are 1000s of ideas out there like this waiting for a novel thinker to draw them out of the fog and make them clearly visible.