Other people are dumping on you, but I think you're getting at where the real 20x speedup exists. People who are 'senior' in one type of programming may be 'junior' in other areas -- LLMs can and do bridge those gaps for folks trying to work outside their expertise. This effect is real.

If you're an expert in a field, LLMs might just provide a 2-3x speedup as boilerplate generators.