You skipped a whole generation there.

their family’s entire biological blueprint

I don’t believe this part holds up. The type of sequencing you’re talking about is an incredibly labor- and time-intensive task. The good folk at these fastfood laboratories are just comparing historical markers and shooting off a list of what those markers tell about you.

It still remains to be seen if insurance companies will eat this data up or not, but they will have trouble providing any justification for dismissing claims without sounding pretty racist.