Everyone should watch Tom Scott's video on copyright law to see just how outdated the laws currently are and how that hurts online platforms' ability to fairly moderate this.

The way YouTube moderates copyright is somewhat forced by outdated laws. Tom Scott made an excellent YouTube video or two about this topic which is definitely worth the watch.

When the country was founded they needed to convince the state governments of a bunch of different states to agree to unify as a single nation.

At that time state governments had more power and influence on the federal government than they do today. Senators were picked by the state government, not popularly elected as they are today, and it was left to the state governments to decide how they would conduct elections and select delegates to represent them in the Electoral College which is the actual body that picks the president.