I can definitely agree that hyperfocus isn't generally helpful. There are many occasions when I'm totally focused on something so much so that I'm totally neglecting things I need to do - and I don't mean things that society expects me to do etc, but things I actually need to do - like basic things such as cooking, eating or sleeping. Sometimes I hyperfocus on things which even in the moment I realise are pointless and that I would actually want to stop focusing on and go and do something else, but I can't because the pull is so strong. Yes I've learned loads through focusing so intently on things, but I've never been able to put any of that learning to any real use.