Firstly, for the caregiver of a child who does not engage with them, it can be very disheartening to feel your child doesn’t 'need' you.
Secondly, play is how the child learns about the world; without proper play skills the child is isolated in a very small world.
Thirdly, play skills enhance our gross motor, fine motor and cognitive skills - if one suffers the others are inhibited.
Fourthly, children who don't know how to play well with their peers at school struggle with depression, inappropriate behaviour, isolation and bullying.
Fifthly, play helps strengthen emotional skills and theory of the mind - the ability to understand things from someone else’s point of view. When a child engages in pretend play, they are taking on other roles and seeing the world from that role. Without theory of mind, the child will struggle to have a fulfilling adult life as theory of mind is needed for employment, friendships and romantic relationships.