I think most people would use the publisher’s website first and then resort to scihub, because scihub requires a doi or publisher’s link to get the paper.
I don’t think this causes much concern, even if so, I believe a good amount of blame should still fall on the publishers and academic systems that encourages gatekeeping knowledge. Especially when these knowledges are generated by public money, then the public should rightfully have access to them.
LLM won’t destroy copyright laws, they are the evident of the problem with copy right as you mentioned. People cannot view the content they brought in the way they want, yet company with a gigantic tech and law team can jump around the grey area for as much profit as they wish, with 0 compensation to the creator of these knowledge.
LLM absorbing copyrighted work is not a win against copyright law, it is copyright law at work.