I wouldn't call myself a beginner, but i'm not a pro either. I'm 5'8" 225 and my prs are 415x1,625x2, and 565 for 2 on bench/squat/deads. I know there are plenty better out there, but i am separated from the normals enough to know i am not a beginner. If i hit it any more regular i would be in a constant state of being fucked up.
As it stands i can't remember the last time i had an injury that prevented me from training. The last big thing i can remember is knee surgery(scope) to clean up some trash left over from wrestling and other various wear and tear, mostly sport type abuse(maybe some jumping in and out of 5 tons with a pack as well). To each his own on finding what works for you and i am by no means trashing anyone's split,workout theories, or goals. Most of us are trying to find a balance between working out and work that leaves us able to attain goals while still going to work and being productive. I went through a bodybuilding phase in my 20s, but that is long gone with me focusing more on strength goals now.
Some people want to look a certain way, some want to be able to move a certain weight. I am definitely in the second group. The weights don't lie and are not political. My theory is that anything you can double on a regular basis(not a one time and done thing) you have attained. All my pr's i have hit at least 6-8 times and i go through down and up phases like a lot of people. I am never that far out from hitting my peak on any of the big lifts within a month without aas though they have surely helped me get there. The trade-off with age and the way i train has always been endurance. I can still hit the strength a bit, but i can't run 3 miles in 19 minutes any more...that is a certainty.