Are Hardware Wallets fully Safe and impossible to hack even by the creator?!
yes, why wouldn't they be? Hardware wallets are the most safest option in order to protect all your cryptos, if you do not trust this, then it is simple, just print a paper wallet.
But hardware wallets are very noob-friendly, and anyone can use them easily,and they are very cheap too, $70 for a huge protection is NOTHING.