Had you published, your book would have likely been on some best seller list. Probably going back at least 10 years.
Reminds me of this....
George Bernard Shaw who famously declared that “youth is wasted on the young.” He later expounded upon his derogatory remark about young people of the day that “they're brainless, and don't know what they have; they squander every opportunity of being young, on being young.” ...
Said slightly different, If we only knew then what we know now.