The rock cycle describes the transitions between the three main types of rocks: igneous, sedimentary, and metamorphic. While it is true that igneous rocks can eventually become sedimentary rocks through processes like weathering and erosion, they can also transform into metamorphic rocks when subjected to high temperatures and pressures. This means that the path from igneous to sedimentary is just one of many possible routes in the rock cycle. The cycle is dynamic and can involve various processes such as melting, cooling, erosion, compaction, and cementation, allowing rocks to change forms in multiple ways.