I don't personally care about copyright. I don't pirate video games because they are generally artistically as interesting as blockbuster movies which is to say not at all but I don't really have an issue with people denying profits to the entertainment industry.
Writing emulators is fun in and of itself by the way. I don't think most of the developers use them to play.
The fact that the system currently relies on copyright is not in itself a justification for it nor does it means it's a good system.
https://slatestarcodex.com/2014/08/14/beware-isolated-demand...
There is no way for you to, with the certainty you did, say what you said. You have absolutely no way of actually knowing what people use emulators for, and you're just pulling it out of your ass and pretending it's the absolute truth.
You are making a massive assumption based on nothing but your own beliefs, and you need to make it clear that the assumption is nothing more and certainly not the fact you are parroting it to be.
Some pirates may just want free shit, yes. But some pirates, especially modern ones, really are working more on a preservationist angle and intending to ensure that works aren't lost or destroyed. Rightsholders aren't forced to ensure that the public actually has access to a work once copyright expires, so the public must ensure that for themselves.