You can't turn a blind eye to the natural saturation of need vs solutions, and derive unlimited optimism from the fact how the people were wrong when they said "everything is already done".

You can't see ideas as some isolated objects that can come into existence on their own. The overall ecosystem breeds the ideas. The forces of demand create the supply chain. Human need funds the solutions. Peace times, plenty of food give the time and effort needed for inventions. If Europe has all the science going on in the 17-19th centuries, it is not because only Europe has best minds. Europe has the people with free time, food and riches to afford the science work.

You can't ignore the overall context of the world around you. You can't keep selling infinite ideas. You can't feed infinite amount of sugar to a person. The so-called solutions can turn toxic, dangerous, and unwanted things. Some ideas might be just be a package of problem and solution packed together. When you buy the solution, you receive the problem as well, which didn't exist earlier.