The short answer is that, you may not understand it, but people with real money do. Do you not like/appreciate the art or is it just the price that you find egregious? I'll be the first to agree that $140 million for almost anything is nutty, but the art itself is beyond reproach. It's mesmerizing, innovative, iconic and historically significant in a way that the 1st appearance of Wolverine could never be - centuries of painting technique and composition turned on its head.
As for the price, when you have billionaires competing for so few masterpieces, sometimes you need to get to $140 million to achieve price discrimination. Like I said, I think paying that much for a painting is pretty nuts. But it would be less nuts to me than seeing that Hulk #180 page sell for 7-figures.
I could honestly say that I've never understood the draw to Pollock's work. I think his work was innovative for the time period in which he was doing it, but I simply don't understand the immense draw to his work. I miss what's mesmerizing about it. Do you think the dollar figures that we see tied with Pollock's work has led somewhat to the appreciation (and for me, over-appreciation) of it art in and of itself?