How many actual humans are useful in your niche scientific domain? And how many actual humans, with a fair bit of training, can become a little bit less than u

How many actual humans are useful in your niche scientific domain? And how many actual humans, with a fair bit of training, can become a little bit less than useless? I mean, my parents used to have this dog that would just look at you like "go get you own damn ball, stupid human" if you threw a ball around him. --edit-- and, yes, the dog also made grammatical mistakes.