This, 100%.
The massive difference in image quality is when shooting in RAW. That’s when you actually get the 48MP & the images are fantastic.
But that’s not the default. The default is 12MP.
That’s why reviewers are so torn on this camera system. If the default was a 48MP picture/quality, everyone would be praising it. But when the default is 12MP, it’s par for the course.