Yes, basically remove the capital from the current economic system, and then patents don't mean anything. All ideas can be free like they were millions of years ago.
But in a capitalist society your reasoning is wrong.
The one ape that sharpened the knife didn't make a factory and start selling sharpened knives. All apes were free to copy it because everything was free back then. Nobody paid for a knife, nobody paid for the skin around it. Today, an idea can make you king of the apes, so ideas cost money to copy.
As someone who makes his living from new ideas, I oppose a system where everyone can copy and use everything they want. Ideas, regardless of how obvious, cost time to create. And to the outsider, that cost is not obvious. You may think that an idea is easy to come by but maybe the guy spent 2 years for that.