I see that franky1 has given you good answers, so I won't get there too.
All I can add is a recommendation to make a new (spin-off) topic about this if you want to continue this debate, since here it's off-topic.
ledger USB device has its own keyboard?? .. show me
It has 2 buttons. A bit unnatural to call it keyboard, but it can be seen so without being awfully wrong, since the Nano S (plus) doesn't need more than that.
