Perhaps it's to highlight the importance of medical care or to introduce a heroic character who can save the baby. It could also be just a creative choice to make the cartoon more interesting and unique.
Overall, the 'Reiraku' anime is pretty close to the manga. There might be some changes for better animation or story flow, but they don't change the core.
In many man cartoons, law and order are often depicted as a constant battle between good and evil, with heroes fighting against villains to maintain peace and justice.
Captain Swing comic is known for its detailed illustrations and complex storylines. It combines action with elements of drama and sometimes even a touch of fantasy. The characters are well-developed and the settings are vividly depicted.
The reason cartoon kids hold hands could be because they want to show a bond. It might be that they are scared and holding hands gives them courage. Or perhaps they are excited and holding hands expresses their joy as a group.