Being a 3d artist is a lot more than being just a great digital sculptor. It means that you are mainly going to create art with the help of technical stuffs- polygon limit, texture limit, hardware and software limits etc.
If you feel like trying it then by all means go for it. I have tried it and it is fun but most of my knowledge came from sculpting digitally.
Any person who excellent in clay sculpting will also be excellent in digital sculpting after knowing how to work digitally and what kind of restriction it presents. Likewise a master in digital sculpting will also be excellent in clay sculpting after adjusting to the absence of undo button and symmetry. 😀
I hope this helps. 🙂
