Exactly.
No he wouldn't. No chance.
And that is the reality of the situation.
Sturridge is a great talent, and when fit he is one of the top strikers in the league, but he is rarely fit, so no sensible manager would consider him as a building block for a title challenging team. I have repeated several times that I wont be disappointed if he stays as a backup for Firmino in the central role, because there is always the (small) possibility that he could pull a Van Persie, but I think that we have much better ways of building a title challenging team.
The first scenario is of course getting some decent money for Sturridge, and offloading his wages from the wage bill, so we could be able to pursue a top class reliable striker, and have Firmino and Origi as backups for the position. This would move Firmino mostly starting on the left, and Coutinho in midfield, and I see that as a very desirable plan.
The other scenario is that we keep Firmino as our starting striker, with Origi and Ings as his backups, and we concentrate the available funds (including the Sturridge money) on a top class goalscoring left sided attacking player (basically, a left sided version of Mane). This also moves Coutinho to midfield, with 3 top attacking players playing ahead of him.
Of course, everyone is entitled to an opinion, but I would rather give the starting minutes in the domestic cups to Origi, so he can continue to develop, instead of hoping for a miracle that Sturridge will regain his fitness.