I've been practically a 16-hours a day computer user for near 40 years now...combined with playing instruments and video games. I've never had wrist, hand or eye problems.
I consider myself extremely fortunate/lucky. OTOH loud music has turned my hearing to utter shit.
I am also a 16 hour a day computer user and used to be a musician and I've had bouts of "ouch" from playing video games and also from lifting weights or riding a bike a long distance. Lifting weights is a good ouch generally, playing video games is a bad one. But my most downvoted comment is a response to someone being really dismissive about ear damage from loud music. I was in a band and it kind of messed up my ears. I don't have RSI and consider myself lucky, I can still work because my job is typing.
The comment that set me off was "how about simply not playing so fucking loud?"
I would like you to look at the parallels between your comment and the one that set me off, and look at my response and look at how a response from someone who IS suffering from it would see your response and realize how it's just... not helpful. "how about just don't get hurt like I didn't?" Easy! Just invent time travel and don't do that thing that hurt you. You can make choices and you can take precautions. But I did not wear ear plugs at shows because I wanted to hear everything and usually did but sometimes didn't wear ear plugs at band practice and that was very dumb. At the time, I thought it was important to hear it as it was in the room. Listening to the buzz in my ears now, mayyyybe I was wrong about that.
For what it's worth, I've also been using computers all day for 25 years and didn't get a lick of RSI. I am also wondering what I'm doing differently. Maybe finding that out can help the people who did get it.
In my case, I think it helps that my elbows are resting on the table always, and I take care that my hands/wrists don't need to be in a weird position for me to type. I did learn to type badly (basically typing at an angle), but maybe that means that my wrists were more comfortable that way.
This is another way of saying "It didn't happen to me because I do something special."
You don't see an issue with the parent comment because...you have the same viewpoint.
I assume you prayed over it, at least.
All I was saying was that I've found it difficult at times to empathize even though I know that I should. I'm admitting my failure to be a good person here. And my "OTOH" comment was a recognition of being a hypocrite. I'm saying sorry without groveling about it.
It is possible, those of us who have been nerds from an early age develop with body skeleto-muscular structure that is more forgiving to this lifestyle.
2 bouts of RSI that I suspect were psychosomatic.
As regards hearing: you should buy a few sets of nice re-usable earplugs to keep what you still have. My hearing is still great for my age but I do notice a difference from when I was younger - a few years ago I stopped hearing transformer whine (which was nice) but it was a stark reminder of the fidelity that I'd lost.