That explains why no one has very heard of Leonardo Da Vinci. The guy had a bunch of great ideas, but other than same drawings/paintings actually never really executed on those ideas.
IMO, da Vinci would not be as well known today if he had not executed magnificently. Lots of people come up with random ideas. Few actually do anything with them.
He was a master painter that worked all the time.
Most engineering ideas of Da Vinci were shit precisely because he never executed them. But he was a great illustrator.