If opinions matter, it means there is no standard, no solution, so you've kind of made my point.

The problem is that keys must be replaced. So your key cannot be your identity. If I get your key then I change your NIP-05 (like some kid did to a custodial LN provider we shall not name) then all your identity would now belong to me.

This is why, not solving identity isn't the same as solving identity. It is the opposite.