Change can be good, we all need to change things up from time to time. Change is inevitable.
But systems do not like change, whether it is a family system, a political system, or a nervous system.
With or without conscious thought systems will work against you to get things functioning the way they always have.
That is why loved ones can react so poorly to healthy changes in one another. Those changes can feel destabilizing to the system.
This is why we often get pulled back into childhood roles when we are around family.