I do t really see a problem with what the Chinese brands are doing, except the ones that are trying to fool someone they're the real deal.
They copy the aesthetic with as many corners cut to still remain good, and they don't put on the logos or names of the brands they copy.
Of course I'm not saying they are equivalent. A Lamy 2000 will never be the same as the moonman/jinhao (I forgot who has a clone) ones.
Same with the VP copies. Although tbf to that one, the patent ended so it's find legally (as if the Chinese brands care), but whatever shade of grey morally / ethically.