For clarity’s sake, the original intent behind copyright was definitely to protect authors and thereby foster creativity, but corporations like Disney have lobbied very successfully over the years to prevent original works from becoming public domain.
Meanwhile, in classic fashion, those same companies have taken public domain works and turned them into ludicrously successful IPs!
I argue that this is a positive aspect of capitalism that our governments have unduly suppressed in favor of corporate sponsors (further solidified by an increasing legal allowance of such sponsorships), and that we should return to a more reasonable timeframe for full exclusivity.