Now, now Peg, a retired engineer relying on an Inside Edition report on genetic genealogy? Tsk,tsk. Remember, we do have a reputation to uphold!
Glad to see that you've begun the process of redemption by asking here on G2G. As additional penance you are assigned to read Blaine Bettinger and Roberta Estes' blogs and all of Edison's G2G posts. If you really want to go all out I highly recommend the MIT biology classes on EdX, 7.00x and then the 7.28x series, not specific to genetic genealogy but an excellent introduction to the science of molecular biology in general and a great background for understanding the science underlying genetic genealogy. And always remember to save a large dose of skepticism for the journalists.
And in case my judgement seems to harsh, I leave you with my favorite engineering adage:
Question: Why should you never argue with an engineer?
Answer: Because it's like mud wrestling with a pig. You can never win and sooner or later you realize that they're enjoying it.
Interestingly, I find engineer's spouses generally enjoy that one more than the engineers do.
And one of my favorite quotes, I think you may enjoy:
The power of accurate observation is commonly called cynicism by those who have not got it.
George Bernard Shaw