Most of the time I use caching it's to cut down on network round trips. If I'm fetching data on every end user request that only updates daily or weekly caching

Most of the time I use caching it's to cut down on network round trips. If I'm fetching data on every end user request that only updates daily or weekly caching that's a no-brainer. Edge caching for content sites is also a no-brainer. Caching something computationally expensive may be fishy but also may be useful. Even if you are just papering over some inefficient process, that's not necessarily a sin. Sometimes you have to be pragmatic.