This is a little harsh.
I agree that we could do much better in terms of backup than Davis. That said, for the most part he does the job of a center forward very well. The only thing he doesn't do is score. If he did, we'd be lauding him as a brilliant target man.
Scoring goals is not the only measure of a player. You only need to look at Ollie's performance against Palace to see that. Davis is very good at holding up the ball and bringing the midfield into play, traits which were pretty valuable to us at times last season. He defends from the front too, something Smith specifically mentioned about Ollie.
He's not great, Benteke is certainly better overall, but to imply he's got no footballing ability at all is unfair.