100.0% +/- 0.0%
You're going to injure something someday lifting heavy weights. I suppose the same can be said for any activity, to some extent. I've learned that as I get older (and ironically, more injury prone) I know my body better and I know how to push myself and when to stop. I've been very thankful for the strength I've built on many occasions; it's all good.
Generally, it's not a big deal. There aren't many injuries you can't recover from. And in many cases, stronger than you started out. But like you said, everyone's path is different. My path is certainly not for everyone. I will say, it allows me to eat pretty much whatever I please and in whatever amounts I want and I don't gain a lot of fat from it. But I know runners and cyclists who eat twice what I eat.
It's kind of a risk-reward thing, no? You can sit on the couch, risking no injury at all, and end up in poor fitness completely unable to fend off the impending zombie apocalypse. Or you can run / bicycle / muy thai / lift heavy weights and risk serious injury but you'll be in a better position to hack the heads off the zombies when they come.
Not judging either way. Everyone's gotta find their own path. But when the zombies come, I don't have to outrun them. I only have to outrun you. 
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