These arguments are pretty weak and end up doing more harm than saying nothing.

There are strong arguments in favor of limiting copyright as it was originally intended (in the US constitution at least). Where the limited time monopoly exists to incentivize people to create, but where the goal is to promote the progress of science and useful arts for the public benefit.

Long term ownership and control can stifle science and art with owners shutting down tenuously connected derivative work.

I need to ask you an honest question: have you every run your own business ?

If not, you should try it, it's a really eye-opening experience that will give you really valuable insight into the world that we live in. The one thing that you will learn is that we are all creatures of the environment we operate in, and very few of us actually have economic/political power that extends very far, so one should always be very careful about ascribing ulterior motives to other people. Most of the time, people just want to make a decent amount of money so that they can have a nice life with their families.