Definitely NOT.
The ONLY alternative AND it must be the associated circuit neutral.
Again...definitely NOT.
There is basically nothing "wrong" with your install as you seem to imply, simply "loop at the light" wiring arrangement which is normal.
There is also loop at the switch system but many cables must pass down the wall and be terminated in the switch box which is why the former is sometimes preferred especially when solid block wall and conduit is in use.
Many "smart" switches do NOT require a neutral and it might be your best shot to look for those instead.
Instructions to provide a neutral at certain switches have gone unheeded, obviously you were not there at the time to make sure it was done, so bad move on your part.
First rule of any work being done in LOS, be there, make sure yourself.