I've been drilling into my kids' heads that far too many people think they are the smart ones by being the naysayers and by saying something won't work. It's lazy and it's useless. It's easy to pooh-pooh an idea and point out its flaws.
The smart and effective people are the ones who say "How can we get this to work?" That takes creativity and thoughtfulness. I have indoctrinated my kids to say "How can we get this to work" instead. I hope it takes hold as they grow older.