I personally think not all players are up for the mtt grind.  When you hear a player say “buy a lottery ticket” it makes sense in their mind due to the fact they can make their hourly rate playing cash vs. grinding a mtt for 5 hours just to make the money, then get their Aces cracked for minimal gain. 

I like playing cash, but the mtt grind is where I gravitate to due to the challenge of that big score or deep run.   However, If you can't handle the variance and swings, mtts aren't for you.  I am in the midst of a hellacious down swing on one of the sites I play on where I am getting it in good like EVERY time just to come up short.  I tell myself though that if I stay within my roll and play the best I can, things will turn around.  Some players have a hard time with this so they aren't as big of a fan of the mtt world.