Extreme powerplay, as in making the characters as powerful as possible, requires you to delve very deep into the game mechanics, grind and do quests in a "perfect" way.
When playing a very in-depth character, while completely ignoring the game mechanics, you'll end up playing a weaker character then you could be, make "wrong" decisions, restricts his choice of equipment...
Both ways are the exact opposite and they both could be considered 'hardcoe'.