20 reps at 225 is an achievable goal of you've been benching for 10+ years.
Bench press isn't my thing, but from everything I've heard, doesn't strength progress begin to plateau after 3 years? Don't most natural lifters make most of their gains in the first 3-4 years and after that its about cranking out minimal gains? And isn't the bench press one of the hardest exercises to keep progressing at once you reach a certain strength level?
I'm not saying 225 is that max. Just that you can't keep adding weight or reps to the bar infinitely simply because you keep training. At a certain point you will reach your natural limit.
All I know is every year we have the NFL combine. And outside of the huge NFL players (like lineman and linebackers), most RBs, WRs, and DBs ain't hitting 20 reps at 225. And those guys weigh roughly as much the average guy weighs despite having significantly more muscle mass and less fat. If barely any of them can do it with 4+ years of serious training and elite genetics, then how can claim this should be easily attainable for the average guy?