Absolutely not. A news site presumes that a majority of the content on there is vetted, researched, and somewhat accurate within the bounds of typical news bias.

Twitter is an open platform that anyone can say anything on. It's a social media site, and people happen to post their personal stories/experiences. Nothing more. I believe we wouldn't have such issues with misinformation if people stopped giving so much wight to everything they read on Twitter/Reddit/Facebook/etc.