While he understands why some may have trouble sympathizing with a three-time drug offender, Tyler offers perspective. A life sentence, people don't really understand it. A man raped his daughter, got probation. A man killed people with his car, got probation.
A skewed left distribution is one in which the tail is on the left side. The above histogram is for a distribution that is skewed right. Skewed distributions bring a certain philosophical complexity to the very process of estimating a typical value for the distribution.
Something skewed is slanted or off-center in some way. A picture frame or viewpoint can be skewed. This is a word, like so many, that can apply to physical things or ideas. A painting on the wall is skewed if it's leaning to one side. Also, opinions are often skewed: this is another way of saying someone is biased. People often accuse news reports of being skewed toward one political viewpoint.