oh I don’t know, good of the country or something...demonstration of actual leadership maybe........
You think a hardcore Leftist like Corbyn thinks that providing the Tories with a majority and mandate is good for the country, even without the pressing concern of a cliff-edge no deal Brexipice? Did you pick the wrong week to stop sniffing glue or something?
The country placed their faith in the Tories to form a government. It's not the job of the Opposition to get them off the rather tricky hook they're now squirming around on thanks to their own poor decisions. If Johnson wants an election so badly he can remove the barrier to it by sending a letter now to the EU requesting an extension (the Benn bill only specfies a deadline) and then the parties will be ready to rumble. Johnson though is an utterly craven coward who (like May) is just stringing along for time hoping something comes up that will sort his problem out, but (unlike May) isn't actually willing to put any effort into achieving it.