If my parrot recites your song after hearing my alleged infringement, I record its performance and post it on YouTube is that infringement?
Last one, if I use the song from your website to train an song recognition AI is that infringement?
"Training a neural network" is an implementation detail. These companies accessed millions of copyrighted works, encoded them such that the copyright was unenforcable, then sell the output of that transformation.
If my parrot recites your song after hearing it and I record that and upload to YouTube. I've violated your copyright.
If a big company does the same(runs the song through a non-human process, then sells the output) I believe they're blatantly infringing copyright.