> "I'll use postgres" was going to be your conclusion no matter what I guess?

Would it bother you as well if the conclusion was rephrased as "based on my observations, I see no point in rearchitecting the system to improve the performance by this much"?

I think you are too tied to a template solution that not only you don't stop to think why you're using it or even if it is justified at all. Then, when you are faced with observations that challenge your unfounded beliefs, you somehow opt to get defensive? That's not right.