The point of Starmer's Labour is that it's a step towards shifting the Overton window back towards the left, for which there's no hope under the Tories who are sliding further and further to the right without any sort of regulation.

Short of revolution - and good luck with that, even Starmer's a kettler - it's the only way there's any hope of it. We got into this mess gradually, and we're going to have to get out of it the same way.

The real problem is that there's no party to the left of Labour, so what the next step is after that is a more difficult one. Still, might as well take the obvious step while there's a chance.

Perhaps we can convince Labour to slide left once they're in.

They can't do that now because they need the votes of Overton-affected floating voters and need to be "in touch" with what those voters want. Or at least appear to be.