The appropriate knowledge can be acquired if you put in effort. This information is useful for those deciding whether the effort is worth it.

The appropriate knowledge can be acquired in anything if you put in the effort.

What exactly are the qualifications? I would have thought a serious, sustained study of statistics--starting with a strong base knowledge of the mathematics of probability and building from there. But based on the resumes I've seen that doesn't seem to be the common opinion.

I would argue you are correct and those without that knowledge will find themselves in over their head quickly without that knowledge.