I don't think you can be proven wrong.
We need to talk about likelyhood of getting injured. Sturridge is a top quality striker when available. No question. The problem is he is likely to be out injured. A player like Firmino is less likely to be out injured. Same with Origi.
What we need from a first pick striker is availability. I think it's quite easy to put it down in numbers. A minimum of 15 league goals, but close to 20 is necessary. Means 30+ league games is a must. Anyone who can't be trusted to play that much cannot be a first pick striker for Liverpool. Considering we have both Firmino and Origi who are likely to be available, while Sturridge isn't means Sturridge has the odds against him. He has basically lived on the 13/14 season for three years. It's time to ask where he is in the hierarchy. What's his role?
I like him. Like I said, he is top class when available. We can see itin the goals/minutes played. But I think we need more goals than we get from him. So he needs to play more and it's not likely he will. We are too forgiving when it comes to Sturridge.
Sturridge is injury prone, that is not a question. But the problem is any player who suffers the wrong injury could also become injury prone. Origi and Firmino could be less likely to be out injured, perhaps. But Firmino could tear his hamstring in pre-season, and spend the rest of his career fighting reduced mobility and constant hanstring stiffness. Major injuries, by and large, always offers some form of permanent debilitation. If one goes through an entire career without having one, then that is luck more than anything.
Like Mane, who's had an exemplary injury record right up until his ACL tear. Now, we have to wait to see hopefully the injury will not have a major effect on his wellbeing long term. What are the chances? You are probably guessing as much as me.
On the flip side, who knows if Sturridge is finally turning the corner after spending a year with Andreas Kornmeyer. LIkelihood of him becoming injury free for the rest of his career? Probably zero. But having Sturridge becoming a serviceable striker again? It is possible.
The point is, you can't say 'let's go buy a dependable striker' and leave it at that. Everything is up to chance, so the fact is if you replace Sturridge, you look at the metrics of the striker who's replacing him, and hope he stays injury free. That is it, really.