>We often hear gym goers doing "training" rather than "exercising". That usage in itself shows a sense of vanity, may be a result of general identity crisis

You're reading way too much into a domain-specific term. "Training" is just when you have a regimented exercise schedule and routine to improve your body. Of course there do exist gym rats with motivations and goals a more reasonable person would consider obsessive. That's because there are for any pursuit. But your post is a long just-so story about a kind of person that the HN audience is predisposition to dislike.