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>but what if I want like 200.000 people so I can find one that has a DNA profile similar to mine

There are already literally entire databases of millions of peoples DNA freely available for scientific research.

Not with names and contact information I assume?

If you were smart enough to hack 23andMe to get genetic data to find a specific person, you'd be smart enough to reconstruct identities from publicly available data. You'd just have to cross-reference public anonymous databases with public non-anonymous ones. Both of which exist, and are free.

So far, the only real use-case for doing this is people trying to identify criminals from just DNA.

You realize this data is often available for purchase or eventually publicly leaked, right? You don't have to be "smart enough" to do the hacking to benefit from it.

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