I made a New Years resolution not to argue about anything that could be googled, or I didn't really care about. This falls into both catagories.
This may be true, however, pool is an exception in this particular area.
How many pool players in the BCA Hall of Fame came from affluent families or grew up with a "silver spoon" (of silver pool cue in this case) I believe on the average you'll find that the income of this group is "middle class" at best....and maybe even the low end of that scale. There's nothing wrong with this, it's just an interesting fact.
I'm not saying you have to be "middle class" or under to be mentally tough, however, it does encourage toughness in general when you don't have things easy.....this could also come from other things besides just financial examples.
Bert