It's not as bad as the vast majority of people make it out to be. Most people don't need walking directions, and using Siri to input my directions is quite nifty.
Why would you make such a statement? You can't back that up with evidence. I would say that walking directions is used quite a lot.
For me personally I only use walking/cycling directions most of the time. In car GPS units are still superior either way for driving directions for various reasons.