Is it lazy or inconvenient not to distinguish between password reset use cases in the UI?

I was recently asked to reset a password due to the fact that the security requirements for the website had been upgraded, and the users have been asked to change their passwords (for those that don't meet the current standards).

Although the user interface simply asked you to provide an email address (to verify that it is an active account) with a call-to-action to change the password, when the email link is sent to my inbox, it was in the format of a 'Forgotten Email' page that had the same flow as if you clicked on the 'Forgotten Email?' link commonly seen at the sign-in page.

Is it simply more convenient to use exactly the same process, or is it simply lazy design or development not to make this distinction as it clearly has some effect on the user experience? Is this a common practice and if so why?