People who can't do simple addition and multiplication without a calculator (12*30 or 23 + 49) are absolutely at a disadvantage in many circumstances in real life and I don't see how you could think this isn't true. You can't work as a cashier without this skill. You can't play board games. You can't calculate tips or figure out how much you're about to spend at the grocery store. You could pull out your phone and use a calculator in all these situations, but people don't.
On the other hand my master 2 students, most of which learned scripting in the previous year, can't even split a project in multiple files after being explained multiple times. Some have more knowledge and ability than others, but a signifiant fraction is just copy-pasting LLM output to solve whatever is asked from them instead of trying to do it themselves, or asking questions.
This is something I see with other tools. Some people get highly dependent on things like advanced IDE features and don't care to learn how they actually work. That works fine most of the time but if they hit a subtle edge case they are dead in the water until someone else bails them out. In a complicated domain there are always edge cases out there waiting to throw a wrench in things.
Look, I agree with you, I'm just trying to articulate to someone why they should learn X if they believe an LLM could help them and "an LLM won't always be around" isn't a good argument, because lets be honest, it likely will. This is the same thing as "you won't walk around all day with a calculator in your pocket so you need to learn math"