So you have visited the future in God's perfect kingdom? You know what it is like to live for eternally in perfect happiness with God? You cannot knock that which you don't know about. I have heard people speak about the perils of marriage when I was growing up, and I was even warned not to get married because for them it was a living hell. For some, I imagine this may be so, but they obviously were never in a happy marriage before. Again, your perspective is only from a sin filled one that does not even have God in your life. Once you get a taste of God in your life, that is all you want. But again, you can judge that which you don't even know about. That to me is just silly.
Play the flute.
For either the flute is being played to you, or you are playing the flute.