We have three strikers at the moment, giving a different three names doesn't add anything to any depth discussion which is what referencing a possible injuries implies.Kelechi and Sterling. Hence why I gave 3 names. Amongst them 3, I think will be fine.
Before the season I was one to say relying Aguero, Bony and Iheanacho would be dangerous. We've seen Aguero go down for long spells, Bony get injured and be rather wank and to then put pressure on a 19 year old and/or a 21 year old winger to be our strikers and do the hardest thing in football (put the ball in the back of the net) and propel a team chasing 4 trophies is not ideal at all.
Before the season it was constant "Aguero, Bony and Iheanacho is enough" now most want Bony gone or dropped and now you've said Sterling will be enough with the other two. We need a quality striker if we let Bony go.
Even with Pep coming in Bayern have Muller and Lewandowski, 2 great strikers as well as depth and versatility.