I agree with the many points but it's worth noting that login forms are made for humans to identify themselves with a service and all his suggestions are design

I agree with the many points but it's worth noting that login forms are made for humans to identify themselves with a service and all his suggestions are designed to make it as easy as possible for a bot/machine to identify as the human. There is always another side to the story and whilst password managers are one type of machine for which this becomes useful, it's not the only one.