Kids own their parents their very presence.

Each person has their own situation so it isn't my place to give specific advice, but each and everyone should pause for a moment on this day, be thankful that they are alive, and consider to do the right thing that they wouldn't regret if they don't do it. Even if you wouldn't call your parents.

Do they really owe that?

I think owing something should be contractual - they consent to owe something in a fair exchange.

A person does not consent to being born.

If someone treats you properly (raises you at least somewhat decently), you don't owe them anything, but you should feel an obligation to thank that person whether it's by saying thank you, or helping them later in their life when they need help.

No one asked to be born. People are only born because their parents brought them into existence.