I would agree with you, IF the locals had ABC, CBS, NBC, FOX instead of KDFW, KXAS, WFAA, and KTVT. I have no idea what those are.
I do not remember the call signs of my local stations, either, but I do know that PBS is 4, CBS is 5, ABC is 11, NBC is 17, and Fox is 50. I even know that 22 is CW, 28 is My Network TV, 40 is Univision, and 47 is ION, even though I never watch those.
I do not look at the guide to find out which number is which network. I only look at the guide to find out what is on at the time. If I find something that peaks my interest, I do not care what the channel name is - I just hit "ok" and I am there.