Being objective, we'd have to agree. Our wallet was designed for newcomers, so it's easy, quick, and accessible, without compromising the need to ensure only users have their private keys. Typically, when you need a wallet that's convenient to access, it's so you can send and receive payments all the time. So perfect for smaller balances that you need to access all the time, on the go.
Anyone with significant wealth should really invest in ultra secure storage, and shouldn't need to access it all of the time!
Basically I used to get in touch most of all the invented system, like web wallet/desktop wallet and Paper wallet but I haven't got any significant issue while I using these method rather than security measures. that's why I like to take this way which doesn't need to submit my private keys.