Sure it's easy to come up with ideas, but it's much harder to come up with ideas that are good. If this list was vetted, I have a feeling it would be significantly shorter. For example, #2: "Incubator site providing office space, hosting, etc. for startups that are seed funded." Unless you franchise it, this isn't scalable at all. It's an idea, perhaps even a business idea, but it's not a startup idea. Or, #9: "Herba…
And you can't prove/know they are good until they are executed. Harder in this sense would just refer to the work required to iterate until it becomes good.
So all ideas you just "come up" with will all effectively be of uncertain value.