The flaw in your logic is that it focuses only on instinctual pleasure and not that of a higher nature. For every "would you...?" that you propose, there is a large group of people who would say, "yes".

The trick to happiness is not always to change what you're doing; it is often to change your thinking about what you're doing. To be conscious enough of yourself to know when you are full and when you are eating food that will make you feel shitty later. To feel the pleasurable burning of your muscles and your mind as you work out and learn new things. To avoid doing anything that will later rob the little time that you have.

I don't claim to be able to do all of this myself, but I have resolved to try to stay focused on these things. There is much beauty in the world, much to experience, without changing anything but your mind.