You are talking about a given coin, I'm talking generally about PoS coins. You also know that very well to build a mining farm what can mine a meaningful amount of coins can be expensive (depending on the chosen type of coins). Running such a farm cost a lot. Also such farms are not holding their value and going to be obsolete relative quickly. On the contrary if I pick a PoS coin, after my initial "investment" I do not need to spend too much more on it.