Okay but why would Ngannou go for a takedown in a street fight?
The guy stood with the likes of Arlovski, Overeem, Stipe x2, Lewis, Cain, JDS, Roz, Gane, etc even though standing was their best bet to win too. He only took down Gane late in the fight because of his injured knee holding him back, otherwise we know he apparently otherwise KO'd Gane in their sparring together. He's also stood with Fury and AJ, though obviously yes boxing forces that unlike MMA. If he ever comes back to MMA he's also probably standing with Ferreira, and if he'd instead fought Jones years ago he'd have stood with him too.
The idea that Francis is suddenly shooting takedowns in a street fight is nonsensical. Francis is a striker. The man believes he can knock out anybody and has never had any problem standing with great strikers to try and prove that. It's his best chance of victory too as when he lands people go out.
Like put it this way and replace AJ with Fury in said hypothetical street fight. Anybody here think Francis is immediately shooting, going for a rolling omaplata on him, or anything to avoid striking with him? I bet there's quite a lot of you saying that well no, against Fury Francis would probably strike a bit with him... because he already thinks he can. Against Fury the takedown would be his backup plan in case he was losing a lot worse than their previous fight went.
People are only saying he wouldn't risk striking with AJ because they've got the benefit of hindsight of just how bad of an idea that would be now. Before the fight plenty of people were saying he could strike with AJ and beat him, especially pointing out that AJ's chin was worse than Fury's and AJ might not get up like Fury did. They know now that's not true.
Truth is AJ's probably the only man alive Francis is scared to strike with now and so wouldn't risk it against specifically him. Anybody else in a street fight? Yeah, Francis is throwing his nuclear hands.