Yes. This is the race for second place. No matter what, the Labour party is still best positioned to get rid of the tories now and in the near future.
Corbyn won't be around forever. The knives are already being sharpened. The knifiest of the knives.
The problem is, Corbyn is still going to be in a position whereby he can choose to go if he pleases. Those insane Labour members that are somehow convinced that every single poll is massively wrong by about 15% over the margin of error might not go away. Even with the proof that this election will bring.