Through face recognition technology, each person can only generate one node, a private key, and a public key.
By setting an upper limit on the computing power of each miner, it is possible to mine on a mobile phone without consuming too much computing power.
If we are interested, we can design such blockchain technology to run on mobile phones together.
I can find your face by just looking up your social media account, mean while can you discover the scalar that leads to these coordinates when multiplied by the secp256k1 curve order? :
x: 83260022149314607220299798889850163602723925708954433956645823190147746092229,
y: 32501403673747823353314855720543420818188361784787882868346931239726724853713
If not I believe bitcoin is much more sound than your facial recognition scheme, do you want someone trying to cut your face off to access your funds? Is that better than protecting against data breaches really?