Sure I might get some RSI, but my welder friend has to contend with someone on site accidentally creating phosgene gas. I don't feel like the two levels of potential self harm are in the same ball park.
Your welder friend could also end up with RSI- depending on how much grinding he does in a day. That was the main reason I quit being a mechanic, it's actually easier to prevent RSI in an office environment by careful selection of equipment, whereas running a grinder for an hour with your wrists at a funny angle since it's the only way to get the tool into the work is sometimes just required.
