No. Manga creators have to consider various factors like audience preferences, genre conventions, and publishing requirements. So, they can't just do whatever they want.
One common place to read One Piece manga is through online manga apps or websites that have licensed the content. For example, Manga Plus is a popular choice. Just make sure you're accessing it from a legitimate source.
The 'One Piece DJ manga' might have some unique storylines or character interpretations that set it apart from the original. Maybe it has more comedic or alternate takes.
Under One Man was based on the manga created by the famous Chinese manga artist Zhao Baogang. The story was set in a mysterious Chinese Taoist sect---the Taoist sect. It told the story of the protagonist Zhang Bao's constant exploration and adventure in Taoist cultivation.
The manga was loved by the majority of manga fans because of its profound Taoist ideas and unique style. The story also had a thrilling tension that was worth seeing.
However, whether the manga is good or not varies from person to person. Everyone's preferences and tastes are different. I suggest you decide whether to watch it or not according to your own preferences.
The manga Under One Man was already finished. In document [2], it was mentioned that " Under One Man 5 " had ended, and document [5] also mentioned the ending plot of the one-man manga. Therefore, it was certain that the manga under one person had been published.