The wallet itself is hackable but it takes some genius to cracked it and its that difficult but the more easier way is to hack the person holding the key thats the easier part
And if that person who is holding his keys was able to give it unintentionally to someone that has knowledge on how to use it for recovery purposes.
Like those victims of those giveaways that are joining airdrops and one requirement is giving the private key of their MEW, there's also a possibility in the future that these lazy scammers will ask for any of the mentioned wallets private keys.