This story has two aspects: ethical and legal. As for the former, it's debatable, depending on which side you are on. As for the legal aspect, it's very simple:

This story has two aspects: ethical and legal. As for the former, it's debatable, depending on which side you are on. As for the legal aspect, it's very simple: https://flypaper.soundfly.com/hustle/how-to-legally-cover-a-song/#:~:text=There%20are%20rules%20about%20cover,system%20is%20called%20compulsory%20licensing.&text=Anyone%20can%20cover%20anyone%20else's,(that's%20the%20licensing%20part https://flypaper.soundfly.com/hustle/how-to-legally-cover-a-...). So they can do these covers perfectly legally, as long as they pay the fees, that's all.