Prior to Reform, you'd be 100% correct but in all probability, the next GE will be between Lab and Reform.
I think after 14 years of being trodden into the ground by the Tories, the voters haven't the patience they may once have had.
Labour cannot wait until 2028.
On Reeves, she doesn't act in a bubble, the decisions she makes must have wide cabinet support, WFA aside, i think she has made some great decisions, even business NI... what was her alternative? the average worker cannot afford more tax & "Tax the Wealthy" whilst it all sounds good, in practice, is extremely difficult, though i do wish they would deal with council tax for the higher bands but that isn't gong to raise the 'billions required.