Eh? Not sure why. Because we have a list of papers we don't believe? It would be naive to believe everything that is published.
I don't like the notion of withholding information, and personally I would not like to accept any paper that does that, but I'm merely stating the norm in the field.
You still have to contend with journal size restrictions. A paper in Physical Review Letters needs to be less than 3 pages. You simply cannot put in enough detail for replication in there. Nature has a page limit of 5.