Yes they used to make a 'demonstration' outside of a German village or town before asking the defenders if they would like to surrenderThere's a decent video out there from Lindybeige about why he considers the Crocodile the most effective weapon in the war, primarily because it could induce the enemy to surrender without actually engaging in combat. In short, Germans would see one of those fire-breathing monsters trundle up and just NOPE right out of the area or surrender without fighting. That has significant value although it's very difficult to measure fights avoided statistically. I can see why Crocs were retained for Korea beyond the regular utility of a giant flamethrower in the anti-fortification role.
If they did not then the Crocs played little part as the problem of the said town/village would be handed off to the Royal Artillery FC