Are Ideas Truly Worthless?

Why is it a meme among techies that ideas are worthless? It makes me really sad that smart people can believe such a ridiculous thing in the internet age.

I'm the author of some ideas lists and I like to share ideas with people. It's what I do. I'm capable of developing some of the ideas but not all.

Some are too difficult. Should I not have the idea? Should I suppress having the idea from my mind? And not share it? Why don't people share ideas more often? They get shut down by their peers and I am sick of being shut down for having ideas.

This meme that ideas are worthless without implementations needs to die.

Ideas are RFCs and ISOs and the ideas of books.