When Square Enix announced the upcoming Final Fantasy 7 remake as a multi-part series, it surprised some fans and disappointed others. Essentially, the news meant that even though they would finally get Final Fantasy 7 remake, players still had to wait years to get their hands on the entire experience.
While Square Enix has provided a reason for its decision in the past, used FF7 remake producer Yoshinori Kitase the opportunity to do this in an interview with the Square Enix blog to mention again. He answered the question and answered why Midgar was the only area that appeared in the game.
According to him, the original one Final Fantasy 7 just too much content to fit into a title. If he and the team had followed this path, they would have had to decide which parts of the original game they would cut for the project to work, and they knew the fans would be upset in this case. In addition, merging the entire content of the original game into one title would prevent the team from giving it the graphical improvements and details it deserves as a modern game, which they believe would have violated the original purpose.