As a concept I like it, ignore who made it and let the work speak freely, Lovecraft was a racist bigot when he wrote his books(heard he condemned them after his retirement but don't quote me on that) and yet he created a horror genre that has survived up to this day,
most history books and old epics that are still talked or referenced today like Hercules, the odyssey, the argonauts, the divine comedy, etc were made by mostly slave owners or were ok with the practices of owning slaves. Hell Shakespeare lived in a place where if you weren't white and English you were less than dirt. So yeah forget the author and enjoy a good story.
however that's just the concept, what people do today is basically, ignore the actual themes of the story and what the author/story is trying to do/say and cram in their interpretation as a matter fact of what the story is saying or as having the same weight as the author themselves. This is less death to the author and more death to the story or better-said replacement of the story itself, and frankly, I think that's just stupid.
That leads to what we have today with people no joke, affirming that SpongeBob is an allegory for white colonization and violence
edit: I'm ok with death of the author when enjoying a work or to let a work speak for themselves but when you are trying to analyse a story and give your thoughts on it you really should check what the author actually wanted to say and who he is, or else you will lose a lot of context and will end up doing what they did to machiavelli
a man who loved rome and republics to the point of writing a giant 800 page novel documenting republic rome life and how a republic should function for it to survive and wrote "Conspiracies are stupid and never work". Called an evil tyrannical schemer for 80 pages of a book written as a satire of kingly rule