I'm 36 years old "which blows" but I'm very lucky to be able to play high level ball of all sorts still. When I was in my mid 20's I started having tendon issues in my throwing elbow a month into the summer. Before I "finally" went to a physical therapist about my elbow, I continued playing through pain for at least 5 years or so. I figured it would go away eventually, but in case it didn't, I started practicing throwing with my left arm during the off season. Learning to throw opposite isn't as hard as one would think. It becomes really easy after you get used to it and your accuracy is actually better. Least in my case it was.
I play SS/MID/CF/LC depending on our setup for D. The biggest challenge is playing the opposite glove hand, combined with the different positions you may play, change in footwork....I was never comfy playing infield opposite, but I became really good in the outfield in a short time. I learned through rehab my shoulder had grown weak and my throwing form from baseball had dropped down lower each year playing softball, which caused me to throw with my elbow only. Nobody points that stuff out when your young and playing chuck n duck. I do the workouts I was shown on my normal arm and also on my opposite arm too.
I can honestly say I throw better with my normal arm then I ever did now and when I play around throwing left people say it looks natural. Anyone with athleticism and coordination can learn to throw opposite. Just practice like anything else...It's a lot of fun to pull out a lefty throw from the outfield after you catch the third out for example. People are like wow
No arrogance intended and sorry to ramble fellas, just a neat thread to see in general.