I dont know what we are fretting over, he is just injured, thats all. But if he is healthy, and shows himself ready and able, he will have PLENTY of chances to play. Because honestly, Morata and Kean is the best chance a backup forward has to play in a top club, either may be inconsistent or not up to the task in any given moment of the season. So as young backup striker, just take your chances with sub minutes you given. Its all up to him.
There is no reason to call him out as goner before he even played a second. Which he hasnt because he is injured.