Thank you for your question. I think that this is a misconception as all of the beauty and greatness of the Imams (as) is derived and inherited from the Prophet (saw) and so when the Shia praise the Imams (as) that is not separate from their appreciation of the Prophet (saw). From a theological perspective, the Shia need to discuss the qualities of the Imams to understand how they are rightful inheritors of the Prophet (saw) and for this reason, they spend time trying to understand those qualities.
May you always be successful.