Although I agree that’s a reasonable enough strategy - it worked for Cameron in his years in opposition. However, Starmer is running the risk that people who are Labour voters wonder if he actually stands with them at all.
https://www.theguardian.com/politics...-uxbridge-lost
If a Labour leader (or indeed, any party) is going to u-turn on a policy every time it ends up on another party’s leaflet then it’s going to end up very bland indeed.
He isn’t going to win every seat so I’m not sure the point of pandering to those he doesn’t win.