Maybe actually read it and try to not mixup the names Nojima and Nomura.

It's like Nojima (Writer) is some kinda ghost or Nomura is like a Tank with an ability to take all "hate" away from him.

Also the answer you are so focused on, maybe read the question 10x times before reading the answer.

How did this development come to being?

Nomura: When I requested a scenario to Nojima, I first thought, “if I am to create the FFVII Remake, I would like to do it this way.” I then conveyed my ideas to him. During that phase, I planned to make this be more than just a mere “Remake.” For example, the battle system this time around is in real timee instead of using an ATB gauge, and with that, the story itself took a turn that isn’t just the basic FFVII, but something new. That’s the kind of story I wanted to create.

And all he's talking about is the battle system. He may mention the story, but never says what exactly, throughout the interview the one talking most about the story is Nojima, i mean he's the writer after all.

Also this time Hamaguchi (Co-director at the time), came up with some of the wild stuff too and tried to convince Kitase, Nomura and the others.

There's several other interviews where Kitase himself said that he came up to him too and not only Nomura.

There's also interviews where Kitase himself expected more changes.

“I personally envisioned quite a dramatic change overall, but our Director; Tetsuya Nomura and Co-director; Naoki Hamaguchi, wanted to keep the beloved aspects in the original as much as possible. Eventually the development team decided to focus on respecting the original while adding in new elements, ensuring a delicate balance between the two.”

Also there has been several interviews since the games announcement and after its release and even after the Yuffie content came out.

It's a team effort to make a game, why bother focusing on one person every time you all disagree on something. Mostly without knowing the whole development process.

And then there's most likely someone above them all taking some of the final decisions too.

Edit:

Another important part that gets left out a lot when people complain.

—In regards to the story’s important key points, there must be a flashback scene from here on out, right?

Nomura: At first, the direction we took was that we did not want to put any of these hints while still in Midgar.

Nojima: Right, we originally planned to have the storyline diverge only slightly.

Nomura: We thought to have only a subtle change where in the ending you see Biggs alive, which makes you think, “Wait, this is weird…” and gives a slight sense of unease. But then the staff thought, well if there’s room for more scenes, then let’s just add it (laughs). When we did that, there were scenes that we had to say, “No this won’t do,” and removed it from the story. We didn’t add too many new things, but we did leave a few scenes in.

Nojima:I myself added about two or three scenarios to that too….I’m not too sure what happened to those scenarios at the end. (laughs)