[EndOfTheWorld]

I think voltron explained it really well.
I know it may make Namie look disingenuous when she expresses that she has considered retiring multiple times over the years but is that really that abnormal? Namie has had ups and downs in her career. When something gets difficult, quitting can seem like a viable choice. Plus she was very aware of how the business works. When she started to lose her popularity, she was thinking, I guess that's it my career is over. But instead of giving up a career that she enjoyed, she decided to stick to it. Because of her diligence, she found success again and revived her career. I believe that rekindled her passion for performing. So she kept going for a few more years.
But now that she is entering her middle age and 25th anniversary she has decided that she is ready to move on. "Finally I can stop dreaming". She realized her dream.
I also think it is understandable that she delayed her retirement until now because she wanted to end her successful career in a specific and special way.
I bet there are so many popular singers who think about quitting all the time, for one reason or another. They just aren't as honest as Namie is about it. I don't think that considering the option to give up on something makes someone fake.