Yeah but it still wouldn't explain How Eren got that vision before having gotten the titan power.
like i said maybe some memory fragments (which are from the owl) transferes like genes through blood since Girsha has the power of the attack titan befor conceiving Eren
Or maybe it's a weird time thing where Eren as the future titan and owl as the past titan are all connected as one. So just like how Eren got memories from the past titan maybe it works in reverse. So what if everything that has happened to Eren up until now was sent as fragments to the Owl in the past. So when he got that memory of Mikasa and Armin even though he had no idea of who they were, it was because of that. And Eren as a child got that vision even though he didn't have the titan power yet was because of the fact that he will someday get it in the future. If that makes sense
Well what if the Owl did say that to daddy Yeager? Because remember when Grisha was injecting Eren with the serum he says those exact same words to Eren. In chapter one Eren has a dream where Grisha tells Eren if you want to save Armin and Mikasa, then he sees piles of corpses and lots of fire and then little Eren wakes up crying forgotten what he had been dreaming about. So maybe the people who have inherited the titan power receive certain memories from past and future selves?