

If explicit permission for specifically AI training is required then AI is basically impossible, because nobody gave that permission.
I don’t think such permission should be required, though, either legally or ethically. When you put something up for public viewing you don’t get to retroactively go “but not like that” when something you didn’t expect looks at it. The permission you gave inherently involves flexibility.
And then a few years later in generic form for much, much less.
I’m actually not terribly put out by the initial high cost of these things, especially when it’s something that isn’t a vital life-saving treatment that people have no choice but to try. Every new technology starts out expensive and gets cheaper as competition arises and better manufacturing techniques are developed.