Also, mice used to be a novel way to interact with a computer that nobody was comfortable with.
There aren’t a lot of people left who are comfortable in a pure keyboard environment. Much less the flip switches on early PDPs.
Computer interfaces change. Being uncomfortable using an interface that’s new to you is indicative of nothing.
Or better yet, giant tardigrades that are roughly the size of a large dog/small wolf for the purpose of having an effectively immortal sled team.