What does mommy's ending mean? Please give some advice, the whole film is crying!

Finally, the heroine became a mommy, because she knew why she chose this job.

If Shishi went to do other jobs, but she wouldn't and didn't like it, she lost herself just to do a job that everyone thought was normal, so she came back, but this time she knew why she was sitting on the stage instead of sitting on it. What the director wants to express is that sitting on the stage should be respected like other jobs. Just like that man broke up not because you were sitting on the stage, but because you were sitting on the stage without a goal. So there is no shame in sitting on the stage. It is terrible to sit on the stage and not know what you want.