For someone who has been going for as long as you have you've very little knowledge on the actual game.
Raz, Aguero or Jesus? Let's think...
1) Aguero.
2) Jesus.
3) Raz.
Now the only flaw with your argument is that both Aguero and Jesus like to play on the shoulder of the last defender, something that Sterling doesn't do, if they'd been on the pitch they wouldn't have been in the position Sterling found himself because they'd have been marked by either Bailly or Smalling. We never will know whether the result would have been different, we DO KNOW that Pep's plan worked almost perfectly.
Now i know it's difficult for you to comprehend as it's been spelt out numerous times but that's the reality of that particular situation.
As for the other great chance, Gundogan's, he arrives in the box at much better times than KDB does, Kevin plays slightly deeper so again wouldn't have been in the position to score the chance.
Finally the shore up bollocks. Their first 2 goals came within 2 minutes or so of each other, you think we would have had time to do a sub and if so who did you want putting on to shore it up.
As for your comment in another thread that Peps a lot to learn i hope to god he doesn't ask you for any advice, as we'd be fucked, though i'm sure you can show him how to be the biggest blue out there.