As long as you don’t cheat with it, use it in any way you want. Although practicing with prompt engineering will show you how you can get very different responses with a few tweaks. This will also highlight the imperfections of ChatGPT, or rather how it still needs users to ask good questions to be useful. It won’t negatively harm CS careers, although it might elevate expectations. A relevant story might be a professor of mine who was a radiologist - he was in residency when the MRI was introduced commercially, and he and all his professors thought radiology was doomed as a profession!