Sub-sophont intelligences (including plants, random rock formations, etc.) in cultivation systems where it's relevant are pre-mature entities, or something to that effect;
But that's the trick,
are they pre-mature?
When you call something a child, you are looking down on them, dismissing their ability to make decisions for themselves.
The Giant Snake trying to eat you might have less planning ability than a 5 year-old human, but that doesn't mean it hasn't made an informed decision.
It is hungry, you look delicious, decision made.
Do you respect it's decision or say "Oh it's just a child. In 500 years it may choose differently..."
A cultivator that ascends to a higher state of being
changes.
In many ways they become a different person, considering different things.
"Oh, this is how Karma works. This is what Divinity is. I have Returned to Nature. I have Spiritual Senses now and my fingers look
awesome!"
But you don't go back and say they are not responsible for their actions
before that revelation.
They were an adult.
They were responsible for their own decisions.
They gained new insight into the world.
They now make different decisions.
If that change is from animal>human is no different from human>immortal.