How can I bypass Android FRP?

My child has transferred phones. I now have his old phone and want to repurpose it, sell it, donate it, give it to a co-worker, use it myself, etc.

The FRP protection prevents me from doing that. I understand the point of FRP but the logic behind it is somewhat flawed and doesn't cover a multitude of legitimate scenarios. I own this phone, not my child!

My child is not present to provide credentials to bypass this feature. How do I reset this essentially bricked device without having to use hacking software?

Note: this question does look a bit like a duplicate of this question, but none of the answers there are acceptable or work.