Here's why:

* Muscle cells primarily rely on mitochondria for energy production. Lysosomes are responsible for breaking down cellular debris and worn-out organelles. Muscle cells have a high demand for energy and need to maintain their structure, so they don't have as much need for extensive lysosomal activity.

* Muscle cells have specialized degradation pathways. Muscle cells have specific mechanisms for degrading proteins and other molecules, such as the ubiquitin-proteasome system, which is more efficient for handling the large amount of protein turnover in these cells.

While lysosomes are present in muscle cells, they are relatively less abundant compared to other cell types like macrophages, which heavily rely on lysosomes for phagocytosis and breakdown of foreign materials.