I'm guessing, but it may be there to help protect you from yourself, especially as you now have to manually enter the password each time. I know that if I have a password longer than around 10 characters and if I've foolishly, unnecessarily included obscure special characters or not selected easy-to-read characters in the password policy, it might take me 3 or 4 attempts to get it right.
Where my password is stored in hashed form (crackable at billions of guesses a second by powerful computers) by a site such as ebay or Amazon I will use long passwords and special characters, but where a hacker can only guess at a password and then must enter it directly and, crucially, wait a few seconds to see if it worked before guessing again, I now consider my convenience as by far the over-riding factor. (Of course, if I can copy and paste the password from my password manager, there isn't a problem, but I've noticed a increasing number of apps seem to be preventing the pasting feature.)