> static analysis tools that produce flowcharts and diagrams like this have existed since antiquity, and I'm not seeing any new real innovation other than "letting the LLM produce it".

Inherent limitation of static analysis-only visualization tools is lack of flexibility/judgement on what should and should not be surfaced in the final visualization.

The produced visualizations look like machine code themselves. Advantage of having LLMs produce code visualizations is the judgement/common sense on the resolution things should be presented at, so they are intuitive and useful.

Although I haven't personally experienced the feeling of "produced visualizations looking like machine code", I can appreciate the argument you're making wrt judgment-based resolution scaling.