If someone steals my LastPass master password, then can't they steal my identity?
This is the same risk you have with your email account: it's simple to use the forgot password link on websites. It's also much more difficult for a hacker to obtain your LastPass master password because unlike email, with LastPass your LastPass password never leaves the PC you're using.
That being said if you pick a poor password or are not careful with your LastPass master password it could be more dangerous. Our hope is that if you have a single password you're likely to protect it better and change it more often.
We also encourage you to check our more security options, such as multifactor authentication, to protect your account data.