Perceptions of Maturity in Anime
Anime is often treated by the general population as immature and silly along with its fans. Certainly there are fans who perpetuate this image, but those types of fans exist everywhere. Many anime which carry adult themes are generally watered down (eg. Death Note is widely known to be an anime about a character who kills using a magical notebook, but the humorous aspects of the show such as L's mannerisms are so overplayed in the community that it is still perceived as somewhat immature despite the very relevant criminological and philosophical themes it explores).
What has created this image of anime as a whole as being incapable of being maturely written, and is it an accurate assessment of the majority of anime? Has this image negatively affected anime being seen as an art form?