I live in some hills and some days I need to fully drive out of them to get google maps to load the map. The map I am using half a gb to cache locally on my pho

I live in some hills and some days I need to fully drive out of them to get google maps to load the map. The map I am using half a gb to cache locally on my phone already. Whats even the point of that cache? Same thing with spotify. Why is there latency searching my downloads library in offline mode?