to change. Now, obviously I don't know her or her circumstances so take this for what you will.
Mom Guilt frequently comes from deep seated personal insecurities. It's an inability to fully accept oneself, that our strengths are good enough, and that we're making acceptable progress on our known weaknesses. Instead, it's an insatiable desire to prove self-worth to others by always needing to be and do more. It likely can be related to people pleasing and needing 'other validation' instead of learning how to 'self-validate'. Moving to healthier space takes a lot of dedicated work and I don't see a lot of people interested in doing that.
or it could be something completely different.