Congrats to Mie for finally opening up about his own opinions and being a manga author
Even as someone who isn't a creator or author, I think it should be apparent that "ripping off whats popular" or stealing idea from other people just because it's popular is wrong, and all it does is hurt creativity and the medium in general with oversaturation of the same ideas and plotlines.
It's fine to take inspiration from other works while working on your own craft, but you should always strive to make something that you can be proud of rather than what will get the most attention.