If you were on an ark with limited space/resources, would you resent the people who produced children while on the ark?

The TV show Snowpiercer is about a train, 1000 cars long. It takes place after a climate catastrophe resulting in the poisoning of Earth’s atmosphere and the deep freezing of the entire planet. The train contains the last survivors on the planet.
The Snowpiercer train is owned by a private corporation, with paying customers in 1st, 2nd, and 3rd class. Stowaways are forced to live in squalor in the tail end of the train.
Nobody can leave the train, or they will die.
The train has limited resources. Therefore, the paying customers are served hydroponic farm food, and the stowaways are fed gelatin bars made out of cockroaches.
The entire train is cramped, but even moreso in the tail section.

In the show, when a person has a baby, everyone celebrates. They consider it an affirmation that life goes on.
But is this realistic?
Wouldn’t you be pissed off if you were on that train, and people had babies? Space and resources are very limited. A new baby means yet another competitor for such space and resources.
If you lived in that situation, wouldn’t you resent the people who chose to have babies?