I don’t think Tomas means to insult our programmers. Perhaps in fact he means exactly the opposite, that to a layperson, it might seem that making the screen scroll must be simple in comparison to some of the complexity that we are dealing with.
However, software development can be surprising, and things that might seem simple from the outside can end up being significantly more difficult or complex than you might imagine. Over the decades I’ve worked in and around software development, I’ve learned to keep my counsel about such matters.
We joke that every time a user says, “that must be simple to implement”, a programmer fairy dies. It is only a joke, of course, and let’s please not jump down the throat of other users because they dare to express an opinion about how hard something may or may not be to do.