Well, it's not really true that all have the same tech. Sometimes, limited imagination or a desire to stick to familiar concepts might make it seem so. But there are plenty of fantasy stories with innovative and diverse technological elements.
Well, it might be because some common tropes and themes are often reused. Like the hero's journey or magical powers.
Often, it's due to limited perspectives and a narrow range of interests in the media. Maybe there's not enough exploration of different angles or underreported stories, leading to a perception of sameness.
Maybe it's because there are certain popular tropes and trends that many authors follow. Or it could be that publishers are looking for familiar formulas that they think will sell well.
Not all Chinese manhwa are the same. It could be that the ones you've come across happen to share some similarities, but there are many unique and different ones out there waiting to be discovered. Different artists and writers bring their own creativity and perspectives to the table.
It might be because many religions address common human concerns and questions about life, morality, and the afterlife, leading to some overlap in themes and stories.
Well, maybe it's because of some common art styles and trends in the industry. Not all are the same, but some similarities can make it seem that way.
Well, one reason could be that major events often have a limited number of key facts and details, leading multiple news outlets to cover them in a similar way. Also, some news organizations might follow the lead of others to stay competitive.
Maybe it's because they often rely on the same major news sources or wire services. So, they end up covering similar events and stories.
Maybe it's because the developers wanted to maintain a consistent theme or brand identity across the series.
Maybe it's because those stories are memorable and have made a deep impression on you.