Bank robbers get on average of $1,500.00 to $4,800.00 at the most which is hardly worth the risk of robbing a bank and getting a prison sentence of around 20 to 25 years.
Now when people rob convenience stores they're likely to not get much money as the most a convenience store robbery nets is around $600.00 to $700.00 because convenience stores don't keep much cash in the register.
And for robbing a convenience store the robber can get from 15 to 20 years as well.