What does best mean? - From the OP's point of view it typically means the most practical solution that can be determined by anyone answering the question and which considers lots of associated factors that I hadn't thought of, while being within the scope of possible implementation given all my unmentioned constraints and is compatible with the skills of myself and my team, as well as taking into account cost/benefit, ROI, business rules, and a very hands-on boss.
And that's why we can't provide the best answer. Our definition of best isn't the same as the OP's definition of best. We don't have the same objectives and we definitely don't have the same environment, conditions, and constraints.
We can't extract a great ux.se compatible question out of every OP's question, but where there's a really good question hidden under the surface, definitely we should expose it, massage it and give it an answer such that the next reader that comes along can see that the question's meaning of best aligns with the answer's meaning of best.
We have to choose our battles and polish the nuggets we find in the dirt, not to mention mixing up our metaphors where needed.