Do you strictly have to deprive others of content to be stealing? Taking away potential revenue, stealing someone’s design, etc. are also forms of stealing. If a gaming company lifts some art someone shared and put it in their game without compensating the artist or getting permission, would that not be stealing? They’re not taking away that content from anyone else - so is that ok?
Pretty sure that you do have to intend to permanently deprive for it to be theft. What you’re describing is copyright infringement. Whether that’s morally right is a different question but it’s not stealing.