In short: No you cannot edit the profile of a curves wall like you can do with a straight wall. Also you cannot make a straight profiled wall curved.
But there are other options to make profiled curved walls in Revit. On of them is indeed Attach top/base.
Another is to use a model inplace and make a void extrusion through the wall with the desired profile and cut in while in editing mode.
Sadly both options are not possible in Dynamo I think
BUT
You can do something else. You can create a Solid in Dynamo which goes through you wall, simulating the “Cut”. You can make a solid family out of this with dynamo and join in with all the curves walls that need to be cut. If you supply a sub-category to it you can turn this Solid Family off in the visibily graphics. See pics below
“Solid placed with Dynamo”
“Solid joined with curves wall”
“Script”
“Turn off VG sub category”