OzoneSherrif said:

I figure the Force could run strong in the Skywalker family and still be unexplained and unmeasurable.

why not

Yeah, why can't it be just like how some families produce a line of good athletes or artists or anything that requires talent? It's an inherited trait that's not necesarily measurable. Doesn't mean other people can't do it, some just got lucky with natural God-given ability that gives them an advantage. At least that's how I always thought about the Force (& still prefer to).