My main issue here would be the fact the data is being sold to a private pharma company. The 'help' you are talking about might come at a huge cost, this simply helps them develop ever more expensive drugs because they are the only ones holding the data.

The problem is that you’re not just selling your DNA. You’re selling the DNA of everyone in your entire family.

Do you have their consent? Because I’d be really, really pissed off if I found my sister or anytime in my family did this test.

If by "help" you mean, make a pharmaceutical company potentially millions or even billions of dollars, then sure.