This paper theoretically and experimentally analyzes models that utilize topology-preserving loss functions specialized for coronary segmentation, including the Skeleton Recall Loss (SRL) proposed by Kirchhoff et al. While SRL has been claimed to demonstrate state-of-the-art performance on existing coronary datasets, this paper theoretically analyzes the slope of the SRL loss function and conducts experiments on various datasets, revealing that SRL-based models do not outperform existing baseline models. This critically evaluates the limitations of topology-based loss functions and provides insights into the development of effective segmentation models for complex coronary structures.