Is typing bad for you?
Typing isn't inherently bad. It has its advantages, such as: 
- Saving time. The maximum possible typing speed is much bigger than that of writing by hand. 
- Less fatigue when writing long documents 
- More accuracy due to having auto-completion and grammar/vocabulary checking software

It can be beneficial even in terms of health. It prevents you from bending over your keyboard as you search for the right keys. Instead, your eyes stay focused on the screen in front of you. Correct typing promotes good posture and prevents neck or back strain. 

Typing can cause several types of hand or wrist injuries such as Carpal tunnel syndrome, but correct typing form (such as Touch Typing) can help prevent that. Moreover, these injuries aren't necessarily avoided from writing by hand.