How did stress come into our lives?

The word ‘stress’ has become an overused excuse for people’s failure. A word used to shield mistakes and hide normal human vulnerability.
Is stress real or a figment of our imagination? To me, stress is a self-induced state caused by a self-inflicted word. It is used as an excuse for failure or not satisfactorily completing a task.
When a person uses the word ‘stress’ they expect forgiveness and understanding simply because of this word.
Does it mean that on other days, performance, productivity, and attitude will be far higher because this word is not used?
If you consider your job or personal life as stressful, then you are in the wrong job or doing the wrong things.
30, 40, 50 years ago this word was not in the vocabulary, but there was still pressure on people to provide for their families. The word stress is debilitating not only to the person saying it, but others around that person as it seems to offer comfort in defeat, especially since they know others are doing the same.
According to Wikipedia, Stress is a term that is commonly used today but has become increasingly difficult to define. It shares, to some extent, common meanings in both the biological and psychological sciences. Stress typically describes a negative concept that can have an impact on one’s mental and physical well-being, but it is unclear what exactly defines stress and whether or not stress is a cause, an effect, or the process connecting the two. With organisms as complex as humans, stress can take on entirely concrete or abstract meanings with highly subjective qualities, satisfying definitions of both cause and effect in ways that can be both tangible and intangible.
Perhaps the solution to stress is to just stop using the word and work through difficult situations. You may be amazed how positive thoughts can make all the difference. Why not try it? Think positively and get results through effort not words. As they say, actions speak louder than words.
Perhaps the world can become stress-free by simply not using this word!