Can Proton Lumo fix bad LLM replies on technical questions like syntax is "a=xy" not "a = xy"? Are Lumo thumbs down really useful?

I can set a thumb up/down on a Lumo reply and explain what went wrong. My uninformed guess is that in general cases my thumb-down may allow them to fix the Lumo reply by prioritizing a different LLM for the question but can they fix or adjust LLM output itself?

For example Lumo suggests to use file abc.prf while the app is actually looking for def.prf or suggests adding configuration file line "a = xy" while app accepts "a=xy" (no spaces).

Should I spend time proving how such reply was wrong (they can not trust my claim)?

Proton says that they do NOT use AI APIs but system prompt to fix replies not by doing corrections to the underlying knowledgeby but by adjusting behavior patterns (instructing the model to search for current information, to express uncertainty appropriately, or to avoid certain types of responses).