My response to you is, after doing 23 and me. I found out I was in a high risk category for many concerns of a female nature..
I found out I was half Ashkenazi a Jewish.
I am adopted so I have no idea what any of my relatives had or did not have.
I also come from the eastern block.
I had genetic testing several years ago.
By the grace of God, all 56 markers came back negative.
Which reduced my chances of the high risk category for breast cancer, and BRAC genes and ovarian cancer, and a few others.
However, I am still considered high risk because, I have very dense breast tissue, and I’ve had several surgeries non-cancer related, and they’ve been reductions, removing scar, tissue and adhesions, cellulitis from an infection, implants put in, and then years later implants taken out and then I was put back together correctly for the first time.
I was fortunate that my insurance paid for the genetic testing that cost $250.
It’s because I was in a high risk category.
I think the genetic testing is absolutely necessary, if your gene pool is high risk.
However, my geneticist told me that even if my markers came back positive my chances were slightly greater.

All 56 of my markers came back negative, which was a miracle, she said anyone, even with markers that were negative, can still develop breast cancer. It’s not an exact science..

I hope this helps.