I don't think that's true at all. Images and text get reposted with or without consent, often without attribution. It wouldn't make it right for the AI companies to scrape when the original author doesn't want that but someone else has ignored their wishes and requirements. Basically, what good is putting your stuff behind login or some other restrictive viewing method if someone just saves the image/text? I think it's still a relatively serious problem for people creating things. And without some form of easy access to viewing, the people creating things don't get the visibility and exposure they need to get an audience/clients.

This is one the AI companies should offer the olive branch on IMO, there must be a way to use stenography to transparently embed a "don't process for AI" code into an image or text or music or any other creative work that won't be noticeable by humans, but the AI would see if it tried to process the content for training. I think it would be a very convenient answer and probably not be detrimental to the AI companies, but I also imagine that the AI companies would not be very eager to spend the resources implementing this. I do think they're the best source for such protections for artists though.

Ideally, without a previous written agreement for a dataset from the original creators, the AI companies probably shouldn't be using it for training at all, but I doubt that will happen -- the system I mention above should be _opt-in_, that is, you must tag such content that is free to be AI trained in order for AI to be trained on it, but I have 0 faith that the AI companies would agree to such a self-limitation.

edit: added mention to music and other creative works in second paragraph 1st sentence

edit 2: Added final paragraph as I do think this should be opt-in, but don't believe AI companies would ever accept this, even though they should by all means in my opinion.