I've had this philosophy since I started mining and haven't lost anything. (Yet :p) Though it did convince me to use Lastpass software for all my passwords, they're all different and all very secure. If you don't use it you should.
I may be new to bitcointalk, but to account security I am not.
Securing your wallet should include securing all your passwords, like using
LastPass or another
password manager. There's more than one way to skin a cat, and a determined thief might use more indirect theft of your personal information to gain increasing amounts of trust. Or might simply hijack your Facebook, Twitter, and email accounts to spite, embarrass or extort you.
Multiple password dumps have shown, time and again, rampant password reuse in the general online public (and if not reuse, poor use as in, easily guessed or bruteforce-cracked).
tl;dr
Up-armor all your passwords, today.