I think you are worrying yourself about LLMs for no real reason. Dispite what the large LLM investors and irrational fanboys claim, it won't displace _skilled_ workers that evolve themselves like I'm positive you are. That said, you should specialize to some balance of what pays well and your interests.

You should consider majoring in something other than CS, not because of LLMs or anything like that but because there is tremendous value in having an intersection of trades that you are good at. I went for Electrical & Computer Engineering in school for this reason (and the fact that I didn't want to waste my time&money taking formal classes for the vast majority of things I've already learned before entering college).

Electrical/Computer Engineering is a sweet spot because you get to learn hardware very intimately but also usually take upper-level CS classes. Learning the hardware also makes much better software engineers. I've yet to run into a single employer in the tech space that doesn't treat the degree as the same or better than a CS degree.