It seems to me that we are still struggling to pin down exactly what a lifehack is, with questions like:
- What isn't a lifehack?
- Is there anything that isn't on-topic here?
- Do questions asking for common-sense advice really count as asking about lifehacks?
- How much of an overlap can we have with other sites, and when do we migrate questions?
- Are devices considered life hacks?
The trouble is that everyone is trying to define a lifehack, but defining a lifehack defines the answer, not the question.
In order to work out what is on topic, we need to place requirements on the question; that's the way StackExchange works. We need to phrase the requirements in such a way that they don't imply that the asker needs to know whether a hack exists or not before they post their question.
(N.B. This doesn't necessarily exclude an "answerable by common sense" close reason - English Language Learners has an OT close reason for "questions that are entirely answerable using a dictionary", and I think "common sense questions" could be similar - that's still a requirement on the question.)