Is it okay not to treat a chipped tooth?

My molar has chipped off a littleㅜㅜ

If you take good care of it, will you not need treatment?

Can cavities still form no matter how well I take care of my teeth?ㅠ

I'm 계속 postponing going to the dentist because it feels burdensome.

I'm wondering if I can avoid treatment by just managing to prevent cavities from forming.