I don't remember Jak II for being edgy, I remember it for the annoying over world (driving) and the big jump in difficulty. I abandoned the series on ps2 and didn't complete them until the ps3 remaster. 2 and 3 are still good games, just not as good as the first one. Ratchet & Clank only kept getting better and better leaving Jak & Daxter in the dust.
The edge generation wasn't all that edgy, still way better than the brown is realism generation, hence I spend a lot of time playing remasters on the ps3. Sly Cooper was a good trilogy as well which I had missed on ps2.
Games going more 'mature' and violent has been going on from the start. Look at how many war games there are on C64 then Mortal combat, Carmageddon, Wolfenstein, Doom, Postal, Manhunt, Silent hill, Splatterhouse series, MDK. Naughty Dog didn't want to make cute platformers, they were more interested in guns and cars which finally resulted in Jak X combat racing (never played it) I don't think marketing had anything to do with it.
What I would like to know is, who came up with the toe cringing dude bro festival stuff which is still so very annoying in Forza Horizon and Dirt series. Is that a push by marketing? Do game developers actually like that stuff? I did enjoy DJ Atomika before the festival crap took over. I miss that era, EA Sports, it's in the game. Still don't know what that's supposed to mean lol. I miss the days when SSX was good.