I really don't understand this whole RPG debacle? RPG literally stands for "Role Playing Game", not "Enemies Regen Health", or "Enemies Deflect Bullets".
It's a game where your character plays a role chosen by you. If the character has a preselected role that can not be changed, then it's not a "Role Playing Game", it's just a game with a fixed narrative.
I don't understand how the enemies having specific abilities or being given multiple options alongside the fixed narrative can classify the game as an RPG?
Either way you still have to defeat the gangs and take over the city, so the end is always the same, you're just given a little more freedom on which order you do everything to reach that ending.
An RPG let's you select the Character's background, skills, "ROLE", and various other things to make sure you get a unique playthrough every single time.
Saints Row just gives you a few tutorial missions, then dumps you in the open world with everything available to do from the get-go. It all leads to the same outcome, you just get to chose which order you do it all in.