But I've been amazed at how many programmers don't like to have them. Why?
Laptop manufactures who don't offer keyboards without numpads, to me, care so little about their customers that their laptops aren't worth shit. I'm looking specifically are all laptops > 14" from system 76. If they want to be taken seriously as a manufacturer, they should consider a line of 15" or 16" laptops that aren't going to leave people in pain, considering changing careers. Of course, I only use the internal keyboard when absolutely necessary and can't use an external with an external display, and it still makes that big of a difference.
Ergonomics matter.