I wish I could say that I disagree with this but I cannot!
I would
much prefer to be able to say that traders
should be able to control their discipline and emotions through experience and adherence to the rules of their trading method, but I think that is seldom the case!
As you say, humans are humans, and that means emotions will always tend to get in the way and that is difficult to avoid without some kinds of aids in the forms you mention.
Although I do fear that EAs are not always that reliable and, if they are, then for how long? Personally, I prefer a personal discretionary approach to price developments within the rule-set of my method, but it is still sometimes difficult to remain sufficiently detached from what is happening on the screen!