I thought that myself for much of my life. I mean, if you've been able to meet all your bills with no repo's or having services cut off, why should you have to get a credit card? Repo's and not paying your bills for some reason ARE reported to the credit agencies, but making payments on time and keeping your utilities current ISN'T. Weird.
I also find it very strange that to GET credit, you need to somehow prove that you don't need it. I wouldn't be asking for credit if I didn't need it because I'd have the cash to pay for whatever it was that I wanted.
But, these are the times we live in now, and I've finally gotten a credit card at the ripe old age of 58 because I want to buy a home.