It’d be a great business model to get into, a company that has some morals and does this sort of work, encrypts the results with a key only the customer has, even while the data is being analyzed, and then deletes even the encrypted data once the business transaction is complete.
People would pay for that. Big time. Folks want the info a genetic test can provide, like possible medical markers and risks, but also want a trustworthy company with rock solid security and absolute data destruction after the job is complete, to do said business with.
The tech is there, the legal record keeping methods are known, the security policies and procedures are do-able.
It’s possible to create the needed data, never let it be seen by anyone not absolutely critical to the scientific process and never allowed off the machines doing the work and never seen alone by only one person, no cameras ever allowed, no data at rest ever stored in any way other than encrypted with the customer controlled key, every step of the process approved by the customer for security, and full destruction of the data in all systems with the final copy in the hands of only the customer ... etc etc etc.
But first, you have to have a company started with leadership who has impeccable moral fiber and a heartfelt goal that the only thing more important than the data security, is the customer, and that’s why they’re doing it.