I really like sibling comment's comparison with Keyboard shortcuts. Keyboard shortcuts don't make mouse or touch screen wrong or bad; some of us just prefer them and find them more efficient and effective.
Using trackpad disrupts my flow whereas trackpoint is embedded on the home row. Further, I am much faster and more precise on trackpoint. I have never on any machine achieved easy effortless pixel-perfect precision on a trackpad, and have never found a way to quickly in a single motion repeatedly reach the extreme buttons/locations I want to. Now, I'm a trackpad newbie, but watching other trackpad proponents use their laptop has only confirmed my feeling. It looks easy but slow.
This is not to say there aren't people out there who use trackpad quickly and efficiently; I very much assume there are, plenty! I just have not witnessed them.
My feeling therefore, possibly incorrect, is that trackpad and trackpoint fulfill different purposes: Trackpoint is a high-learning curve, high-skill ceiling option that is ultimately more efficient for some. Trackpad has FAR lower learning curve and is much easier to start using, and is right choice for majority of casual users or those who don't prioritize input efficiency - but it feels like it plateaus earlier, or at least those in my group of family / friends / co-workers plateau with it far sooner.