It's a mess. Might be a USA only thing as I've not seen any European creators complaining about it, but This isn't the nutcase Facebook Ts & Cs - Adobe have screwed up. It might not be what they mean, but it's what they've said and they are being quite explicit. It looks like a rights grab. They'll use your work for whatever they want. and until they change the actual Ts & Cs to say otherwise (and there was talk that they were going to change their Ts & Cs yesterday?), then that "anything they want" could well be Gen AI. Hell, it could be to print it and sell it on street corners too looking at the wording!
I get the AI argument - AI needs to be trained. They say they used Adobe Stock and royalty free work to do that. (The Adobe Stock element of that raises questions all of it's own - did they
ask? Did they
pay? If they did, well great! Fine! No issues! But if they're using your content without you explicitly knowing it to produce elements of an AI image thats being sold commercially, taking work off you for little to no skill or effort, and you have no rights to? But then that's derivative work anyway isn't it)
I do photography and I'm not a pro (and I'm probably now glad I'm not a pro). It strikes me that this is a much bigger issue in the graphic design space right now - it's scary how easy it is to generate a half decent graphical image of anything in any style. There are apparently brands and manufacturers laying off their design teams and replacing them with AI. Trained on their work.
The problem here really is that Adobe have left themselves wide open to misinterpretation (or the correct interpretation?) in an industry sector that they almost created, that is already suspicious of them and annoyed at their business practices, and they apparently might now destroy. Taking it to the extreme - because why not

- You're paying them a lot of money for their software to steal your work to train the Gen AI models that will replace you. Or it'll make cloning out a bit easier. But....
The viral tweet written by science-fiction and fantasy
author and artist, Joanna Maciejewska (@AuthorJMac) really does strike a chord for me,
"You know what the biggest problem with pushing all-things-AI is? Wrong direction .I want AI to do my laundry and dishes so that I can do art and writing, not for AI to do my art and writing so that I can do my laundry and dishes."