I've recently found LLMs to be an excellent learning tool, using it hand-in-hand with a textbook to learn digital signal processing. If the book doesn't explain something well, I ask the LLM to explain it. It's not all brain wasting.
We have agency to decide and if the majority decide on brain rot I really don't care.
I have been learning things from the internet for 30 years and LLMs are just the greatest gift. If someone isn't leveraging these tools to increase what they know good luck.