Why do Quora, Wikipedia, WordPress not consider url length and stop words in its URL for SEO Optimization?

Wikipedia, Quora and WordPress (all sites using wordpress) is really having a higher rank in google but it's url is having STOP WORDS and VERY LONG URL. Why they are not considering these and not avoiding them.

http://en.wikipedia.org/wiki/One…

http://blog.woorank.com/2013/05/…

https://www.quora.com/I-want-to-develop-a-mobile-diary-app-that-can-work-most-of-the-time-offline-and-can-store-the-data-offline-without-any-internet-connection-and-that-can-sync-its-data-to-a-server-when-an-internet-connection-is-available-What-modern-frameworks-would-you-recommend-for-undertaking-this-project

Why do Quora, Wikipedia, WordPress not consider url length and stop words in its URL for SEO Optimization?