creative as we want?
Um. Seems to me that you take creativity too lightly. We can be so, as much as we want. But few of us are really, originally or even cleverly creative in a way makes our work desirable or useful to others. That skill, just like the ability to design and make a fine piece of furniture or even just to improve a washing machine to make it better value, longer lasting, more efficient and easier should be encouraged and rewarded. If it goes on being desirable or useful over the years, the rewards should keep coming. I suspect that the original length of a copyright was to approximate to the expected life of the creator.
Up until Victorian times, copyright was unenforceable internationally. The young USA was among the worst offenders - the China of its time. Charles Dickens was rather bitter about it as it was his living and cost him dear. Why should anyone expect to sponge off the ability of others?