This is because of the fact its a offline wallet and cannot almost not get hacked..
Hardware wallet or online wallet, they have both disadvantages and advantages it will just depend on the
user of bitcoin of how he will going to take care of his hard earned bitcoins.
True, completely true, but i do think it's the community's task to educate new users about the advantages and disadvantages of different types of wallets.
I'd never recommend an online wallet, so i try to give all the pro's and con's about these kinds of online wallets (pro = easy accessible and small learning curve; con = you don't have your private keys with you, so you're basically not in controll of your coins). In the end it's still the user's choice.