I've almost always found keys on the keyboards to fail before the trackpoint. The one exception I've had is a bluetooth trackpoint keyboard that someone sat on.

Go check out videos of new computers users from the 90s, mice absolutely have a learning curve. (I say from the 90s because today many people likely grew up with them).

Sure you already know the mouse, so good for you. As a comfortable user of both trackpoint and mice, I'd rather use the trackpoint for almost all uses. The few things I'd prefer a mouse to trackpoint I'd also prefer something else to the mouse (e.g. 3d orientation I prefer use a spaceball like device to mouse, and for drawing I'd prefer a stylus to mouse).