I think I've made plenty and I don't feel differently.

You could ask the same questions about the actual duration of copyrights as they are today. You present those rhetorical questions as if they were some argument against this proposal, but they're just things you need to think about regardless of what scheme you come up with: why this, and why not something else? It's not like "life of the author plus 70 years, or 95 years from first publication, or 120 years from creation" is any less arbitrary.

We should remember that the purpose of intellectual property laws in the US is explicitly, per the US Constitution, "To promote the Progress of Science and useful Arts...." The purpose is not to ensure that creators can keep collecting money decades after they created their works. It may be useful to ensure that as a way to promote progress, but it's just a tool, not the goal. If progress is better promoted with a 10-minute copyright term then we should do that instead.