Why do few notebooks except ThinkPad have pointing sticks (Little Red Riding Hood)?

DELL HP has products, but they are not necessarily red. Generally speaking, this is the logo of a business machine. The earliest design of thinkpad did not have a touchpad, so the little red hat became a necessity, and It is precisely because there is no touch panel that the overall design of the thinkpad is more portable, and the size is also suitable for business travel and office work. At present, except for DELL's latitude and HP's elitebook, other manufacturers really can't find decent business notebooks