While it is true that weaker hydrogen bonds can occur in larger molecules, it is not universally the case. The strength of a hydrogen bond is determined by several factors, including the electronegativity of the atoms involved, the distance between the atoms, and the surrounding environment.

In general, stronger hydrogen bonds occur when the electronegativity difference between the atoms is greater, the distance between the atoms is shorter, and the surrounding environment is more polar. While larger molecules may have some weaker hydrogen bonds due to increased steric hindrance or other factors, they can also have stronger hydrogen bonds if the necessary conditions are met.