different neural network types excel at different tasks - image recognition was invented way before LLMs, not only for lack of processing power, but also because the previous architectures didn't work with languages. New architectures don't appear out of thin air, they are created with a rough idea of what we could need to make the network do a certain task (e.g. NLP) better. Even tokenization isn't blind codepoint separation but is based on an analysis of languages. But yes, natural languages aren't "parsed" for neural networks, they don't even have a formal grammar.