The bigger mistake would be trivializing the rest of the technology involved just because LLMs are the newest piece. LLMs are only "magic" because they're built on a stack that was already "magic" without them.
LLMs are impossible without:
- operating systems
- programming languages
- compilers
- data centers / power grids / air conditioning
- servers / switches / routers
- CPUs / RAM / GPUs / SSDs
- fiber networks
- etc