Well, it seems you are not open for discussion. There is no reason to disparage the senior devs that participated in the study just because you don't like the results of the study. But the study happened, and it is clear: experienced developers are the ones that suffered from using LLMs.
> but it's just illogical for a junior to get benefits and the seniors don't
Experienced car drivers won't benefit from a youtube tutorial how to drive, junior car drivers might. That's similar to junior developers being potentially the ones who can benefit from the basic things that an LLM can help you with, e.g helping you with syntax and structure your thoughts and write a scaffold to get you started. Those are concerns that experienced developers don't need help with, similarly how experienced drivers don't need youtube tutorials how to shift a gear. There is nothing illogical in that premise. Do you agree?
> i don't think i can do better than the LLM
I most certainly can tell you that there are 1000s of developers that can do infinitely better than any of the current LLMs, and those developers are fairly often senior. It seems like a skill issue you mentioned in the beginning of your post might actually be on your side.