I don't think they need to learn 'AI workflows' (whatever that means). But I think it makes sense to use the LLM's as a resource.
I've used them when studying new languages (human languages not programming languages) and ML algorithms and they've been really useful.
Learning to check the citations it gives you is a useful skill too. I wish many adults were more sceptical about the things they are told.
I assume "AI workflows" means knowing how to split up a task to create a chain of agents that can complete a specific task reliably.
A bit like software development.
It's true that you can use LLMs as a learning resource and to unblock you. But students just aren't. They are using them as a way to avoid thinking, avoid research, and just spit out an answer they can paste in to their homework.