It is supposed to benefit society as a whole. If protection is too long, limited access to (and reuse of) existing work reduces the benefits of having a law. If protection is too short, some works may not get created due to the lack of incentives.
Someone attempted to calculate an optimal duration, and concluded it was about 15 years: https://rufuspollock.com/papers/optimal_copyright_term.pdf (Related article: https://medium.com/basic-income/the-zombification-of-intelle...)
I guess I was talking about just a couple.
Reduce copyrights to just a few years and Hollywood, with all the parasites in it, would just lift songs like there's no tomorrow and further dodge paying a cent to the artists involved.
Many countries used to have strong explicit exemptions for personal use, but even just making it shorter in time for personal use would make a huge difference.
More than that, we’ve seen cases such as the Louis CK video release where he asked politely for people to pay and they did.
They could end up making a ton of money with it and not benefitting the artist at all.