Obviously does not apply for all dreams in this category. I'm sure we've all had some, those blurry, vague, terrible 'quality' dreams or even mere fragments we recall in the morning or later during the day. But were they really as we remember them? Do you think it's likely that most of those low quality dreams were actually normal or even vivid, but it's only our lack of memory of the dreams that makes them seem low quality? Are we forgetting large chunks, quality, and vividness of those so called vague dreams without realizing? I don't think it's that far fetched tbh. Personally I remember having less and less of these low quality dreams the better my dream recall was.