There are a lot of fanfics stripping away the powers of the rainbooms, but is that actually possible? They don’t really seem to care about what they do as long as they keep to their elements to a certain extent.

Yes. It's how Celestia and Luna lost their ability to use them

7903232
I thought it was because luna turned evil and celestia used it against her.

790367 and in doing so they betrayed what the elements stood for. That's why the lost them. The same applies for most of the anon-a-miss stories. The girls betrayed what the elements stood for, so they lost them.

7904308
How come this never happened to the girls in canon then?

7904532
Well to my knowledge they never willingly betrayed what their element's are in canon.

7905605
Interesting

7903058
I don’t think it’s possible considering the girls are the elements of Harmony. Betraying their element just means that they can’t access that power until they’ve rekindled it. Like what happened with Discord.

7905605
They did, Discord tricked them into doing it. But because they are the Elements they can’t loose them, Twilight reminded them which brought their magic back.

7905885
Oh ok