GIGO (garbage in, garbage out), likely coined in the late 1950's is just as relevant today.

You need to know how and understand to operate a handsaw to use a bandsaw or a mill. You need to understand variables, loops, strings before writing an "app" (and then you need to understand user models, security models, databases, UI / UX).

You can't "trust" AI / LLMs without first giving it fresh and relevant content -or it will make information up. You need to give it the important information for it to synthesize correctly -and that relevant info needs to be in the current context. You can't just ask a question and expect it to "do the research". You need domain expertise to be able to validate the response.

AI is just a tool to make it easier to use your existing tools.