Ultimately it’s their choice but I think it’s a bit dangerous not having an emergency fund.
For instance if you decided to go out in a city that’s not your home town and if for some reason you miss the last train home then you’d be screwed without enough money to cover either a taxi or hotel for the night.
That use case for me would happen every few months. I’m a Kentish town lad with very few people who I’d feel comfortable asking to drive 50 miles to pick me up at 4 in the morning.