There are very many differences already pointed out, so to add an other one, there is a difference between a company doing something at scale and for profit, and a private person doing something for themselves.

The people in this community that says “copyright infringement isn’t theft” do not refer to copyright infringement where people exploit the work for-profit and put it out as their own (feel free to find a single occurrence to prove me wrong). The word plagiarism comes to mind, which is morally and (depending on country and circumstance) legally a bigger crime than copyright infringement. The legal system usually also recognize that exploitation done for-profit and large scale should be considered worse and punished harder.