edited previous post.
Just bustin' on you.
Any tool will work, for a long time, until it doesn't.
1) avoid injuries: develop proper form, lift for results, not ego.
2) results seem to be related to how well and disciplined you can be in following areas:
c) workout (presuming proper program selection for goals)
My 14 year old son is doing a 5/3/1 variation, primarily Arnold's big 6 lifts...
His stated goals are strength, aesthetics and MMA.
He's been at it for about 18 months. Squat/Dead are >1.5 bw, Bench is 1.3, Curl ~.66 bw.
He occasionally gets caught up in the numbers, but hasn't seriously hurt himself yet and is monstrously strong for his age.