You put a lot into your art.
The designs, the linework, the hours, and what your client walks out with and will look at nearly every day of their life. Every piece is a business card. For your craft, for you, and for the shop you work in.
So how much care goes into keeping your wrists healthy, steady, deft and pain free?
Wrist, elbow, neck and back pain sits between a good day doing what you love and a day spent thinking "I hope I don't mess this up." Or the quieter one. "How long can I keep doing this?"
Your reputation and your livelihood ride on your hands. A day off doesn't fix that, and neither does grinning and bearing it. There are some genuinely good tools out there. I've used most of them. There are also things you can do with nothing but your own two hands and a few minutes between clients, and almost nobody in this trade has been shown those.