Pin code required for all transactions as extra security, so if a seed gets hacked the hacker doesn’t know the pin to approve the transactions:)
Nice dream 
but when a hacker steals your seed
does not need any password or pin 
your seed
generates all your private keys…
You cannot edit your the Metamask seed 
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it should confirm like binance…phone and email…after thats is really hard to lose funds … 
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