An argument many on the left use, until they want to force those private companies to ban people THEY don't like, or take down material they don't like, like wanting facebook to take down a slowed-down video of Nancy Pelosi,
If those private companies have the right to censor or remove images or people, (unclear at the moment), then they likewise have the right to /leave up/ any material they want, and to NOT ban anyone they want. (Unless they directly break the law, no child porn tyvm!)
If you're going to claim these "private companies" have the right to remove images, videos, and people, then I hope you will be consistent and condemn people like Carlos Maza and Vox for abusing youtube's right to /allow/ anything it chooses.