i would have once agreed with you, but have decided that it's largely because trackpads are just usually dodgy pieces of shit. i was a huge fan of thinkpads starting with the 600e/x, and even once dropped $100+ on the IBM external keyboard with a trackpoint, just so i could use the nipple on my desktop.
but, today, i can't think of anything i miss about the old trackpoint compared to an apple trackpad. the apple trackpad is more than precise enough; it is better for tracing curves since it's not a joystick (not that this comes up often, but hey); it doesn't get that really irritating ghosting effect where the trackpoint would register a "lean" to one corner or other until you jiggled the hell out of it and prayed; the surface doesn't gunk up with oil and sweat and get slippery (i guess this is some lipophobic material?).
it's definitely not worth buying an Apple computer just for the trackpad, but all things being equal, it's what i'd pick. at the very least, i stopped pining for a trackpoint a long time ago. it was nice, but meh, it had problems and the trackpad fixed them all for me; ymmv.