I don't see anything wrong with the question per se, in fact it is quite an interesting question, it's just that it is so massively broad and highly dependent on the person, location, season, experience, type of camping, etc. that it makes it almost impossible to list. The OP in question did give some specifics as to season, but not detailed enough location or even type of camping, making it very hard to answer. The answer they supplied (now closed) was missing a few items (e.g. cooking equipment) that would be essential, but had others that seem weird (to me at least), like the satellite phone - PLB would be better.
The list is very difficult for "luxury" items - a person going for a 10-day hike might forgo a large soft self-inflating mattress in the place of a much smaller inflatable, or even no mattress (terrain dependent, not so great on rock and a definite no-no on ice/snow), or even in favour of a hammock. Whereas someone going for an overnight or a couple of days might take these with them and a pillow too, just 'cause they don't care about the weight/volume for the short span.
Now I can see a place for minimum lists -
"To be safe you must have at least these items for this sort camping" , but even that is quite broad, so would require quite a few separate answers (or one massive one, not that either are bad). Just think of the differences between going camping from your car and going for a 10-day hike in the same location/season/climate. Luxuries could abound for the first, but not for the second, while the minimum list should be roughly the same.
Edited to add: now that I think about it a bit, it should be possible to provide lists, kind of like a flowchart or key-based questions (e.g. dichotomous key) to get to the right one, with answers titled for each type.