For the conscientious non-competitive athlete, Judo is definitely safer than wrestling. That's because if you're focused on reducing your injuries, the rules of Judo will protect you whereas the rules of wrestling will not. Example: Your opponent gets rewarded only if you land on your BACK which has almost no risk of injury even from a hard throw. The worst that's ever happened is sore back muscles. But in wrestling it doesn't matter where you land, it can be forward with your hands all tied up. Also, wrestling is fast, scrambly, and pure wrestlers don't have BJJ awareness about which joint is about to be accidentally broken. I also heard a lot of people complain about twisted fingers in Judo -- how about, never grip extremely hard at any point in time; keep it moderate, and if a giant guy with huge hands is trying to break your grip you should obviously let go.
In only a few months, in my wrestling club we've had a shoulder torn out of socket and another guy's elbow torn out of socket. I also slightly injured my ankle which lasted 3 weeks, due to being the victim of an awkward lateral drop which twisted my leg before I landed. In 2.5 years of Judo I've never seen any injury of that scale.
So yeah, competitive Judo is indeed dangerous. But casual Judo is way safer than casual wrestling; in my opinion, it is just as safe as casual BJJ!
I'm only 23 years old -- is my body not telling me the full story, and that there is some "invisible" way that I'm becoming crippled that I won't feel until 50? I always thought, chronic pain will warn us of bad things to come, but one old guy told me that when I get to a certain age things will just randomly start hurting out of nowhere that I never even realized were injured. Can getting thrown on your back repeatedly REALLY be bad for you if the only symptom is muscle achiness for a day? I've heard multiple sources that the impact, as long as controlled, is actually HEALTHY for the body's circulation. What is your experience, old guys?