Ideas that are not well researched are worth little. But ideas that are scrutinized and based on months of customer interviews and market research are extremely valuable.
Everyone inherently knows that. That's an "idea" that is more like a research project that had tons of effort put into it.
Patrick's comments are for the people who think "BLOCKCHAIN BUT FOR DATING SITES."
But, making goldsmithing accessable to the general public would probably be a very difficult business to start even for someone experienced. How do you cheaply train up random people to get good results? Maybe with the right equipment and expert guidance, people could do it. However, the research and design that would go into putting that workshop and program together would have to be pretty extensive.
Hence, as good as an idea as I think it is, it's valueless without a detailed plan and some actual validation.
This is called execution. It's not an idea anymore.