My mother wouldn't be able to do what you did. She wouldn't even know where to start despite using LLMs all the time. Half of my CS students wouldn't know where to start either. None of my freshman would. My grad students can do this but not all of them.
Your 20 years is assisting you in ways you don't know; you're so experienced you don't know what it means to be inexperienced anymore. Now, it's true you probably don't need 20 years to do what you did, but you need some experience. Its not that the task you posed to the LLM is trivial for everyone due to the LLM, its that its trivial for you because you have 20 years experience. For people with experience, the LLM makes moderate tasks trivial, hard tasks moderate, and impossible tasks technically doable.
For example, my MS students can vibe code a UI, but they can't vibe code a complete bytecode compiler. They can use AI to assist them, but it's not a trivial task at all, they will have to spend a lot of time on it, and if they don't have the background knowledge they will end up mired.