Gerrard isn't on form, but he's still one of the most likely people in the squad to actually help turn the team around. He's the best(fit) goalscorer, with only Sterling coming close.
I'm not sure those wishing, that not only should he be dropped, that he would leave be let go, realise that that will leave us with close to zero midfielders who actually make things happen. We'd be left with a crocked Sturridge, an very young Sterling, and the underperforming(and yet to totally convince) Henderson and Coutinho. The rest are great at keeping the ball moving, but not so good at actually making us score goals. Or at least, they've yet to show they can do much more.
I'd love if we had players that could do as much as him come in, as he does have faults and he's not on form. Unfortunately he's still miles ahead of most of the rest of the squad. The likes of Allen, Henderson(maybe harsh, he has a few assists), Coutinho, Lucas, Can, Lallana, have contributed next to nothing this season, and don't look to have the mentality to bring us out of this form.
Granted, our lack of strikers doesn't help them much, but we should still expect more from at least some of them.
Basically everyone is underperforming and Rodgers doesn't seem to know what to do. I'd trust Gerrard, the one proven in this regard, to be the one to help drag us back into form. Once we have everyone playing at some level again, or someone in the squad decides to become a leader, then we could look at other options.