@BIossomtoes well Blair committed as to War in Iraq on the basis of no evidence of weapons of mass destruction and Cameron called for a referendum on Brecit to call the bluff of the Eurosceptics then lost it. And Liz Truss ...He has competition.
However, I don't know who is advising him as he's chosen a bunch of fiendishly difficult hills to die on - reducing inflation (which will only work if people experience wage growth or prices dropping), reducing NHS waiting lists whilst fighting industrial action with every healthcare profession at once AND choosing to break international law to transfer a handful of migrants to a third country for an alleged deterrent effect that we don't know will work.
There's a narrative in the leftwing press that Starmer is too cautious but rather than this being about fighting an old battle over whether Labour can be trusted with the economy it could win a new battle over whether Labour are just a safe pair of hands rather than hubris driven maniacs.