2 years is exactly correct?
I recently said a beginner could get to his circa max in 2 years. It's quick if you waste no time "experimenting" like in the past. I would argue that theoretically there's little benefit to stall the progress, theoretically you could also get out faster, limiting damage. Better the abuse occurs sooner rather than later, when you are still resilient. But it probably won't play out that way, it becomes an addiction...