Littering and running red lights causes problems for everyone in society. Copyright infringement... doesn't. It's mostly just a small dip in the expected profits of a monopolist.
If you litter on a street I'm not on, then it doesn't affect me.
If nobody will ever get paid for intellectual property again, then it will absolutely affect me. It's the end of a whole category of creation, and a huge net reduction.
It's easy to litter, and by FAR most people get away with it.
It's easy to infringe copyright, and by FAR most people get away with it.
Yet you feel this is justification to remove copyright laws, but not littering laws.