The two questions mentioned are slightly different. One was asking why the adjectival marker 的 is needed in reduplicated adjectives, another one is asking why adverbs of degree like 很 (very) are not used on reduplicated adjectives. The two questions were answered differently.
But it is beside the point. There are actually many duplicated questions. When I see a question that seems familiar, I would do a search to see if an existing answer from a similar post would answer the new question. If I found one, I would vote to close the new post. If the new post had already generated the best answer for the questions, I would post a link to the older post and vote to close that post instead.
I wonder if we can have a merge posts option, that merges the newer and older post into a single one.