@animekek69 Just to clarify common misunderstanding: Most Isekai 'mangaka' didn't get to choose the story, they just got appointed to illustrate the story from the original author. It's simply illustrating job because they're enjoying it, there's nothing bad about that.
And isekai authors are usually just amateur chuunibyous writing for giggles for free to read on syosetsu (I know some of them even from before they're becoming popular and published by a company), it's the publisher who wanted to make money from it.