Why can't I edit animation curves imported from Maya?

Questions & Answers
1

I infer from this post that you need to duplicate the animation before editing it?

2

animations imported with model assets are read only.

You can only edit animations you created from within unity.

This is to allow you to update your asset later on. If you could edit the animation curve, your chances would be killed directly again on your next update of the model from maya / asset reimport