Probably, but as Minister after Minister warns about the 'rise of populism' - and the dire consequences of a failed Labour Government - expunging any diversity of political opinion and shearing off the MP's who still (unfortunately in my opinion) act as a pole of attraction for sections of the left is utterly politically stupid. Even Blair, as Red Squirrel noted above, knew that and largely left them to it.
Personally, I don't believe Corbyn and the 7 have either the political analyisis or ideological commitment to develop an organisation that could develop the popular set of left/green politics that are now needed, but Starmer seems determined to create the conditions for others who might and who the labour left could work with.
Starmer - beyond the political class/centrist commentariat media puff about how disciplined, hard working and clever he is - has revealed yet again that politically he's both toxic and stupid.