I think that the quote speaks quite passionately to the ideas that Orwell presents in Animal Farm. For Orwell, the human experience is something that he sees as the leadership of the pigs stamp out. The freedom and nuanced intricacy that is a part of human consciousness is what the pigs, especially Napoleon and Squealer, seek to destroy. For Orwell, the silencing of voices is what he objects to in the greatest of degree. In chapter 7, when Napoleon encourages the animals to speak their mind, only to execute them and crush all dissent, Orwell recognizes clearly that the power of governments to do this in any form must be spoken against. The human experience of speaking one's mind and following one's heart is something that the leadership of the pigs stamp out, and thus, is something that galvanizes Orwell. At the same time, Orwell makes it clear that any political order has the potential to do this and must be objected to in the strongest of terms because of it. For Orwell, the real danger of the pig leadership is that it takes ideals that the public supports and twists them for their own benefit. In doing so, Orwell is able to speak passionately to this idea of the "quality of the human experience," and seek to validate it.