It is possible to have a separate iTunes / iCloud password. I know people who don't use Family Sharing but share the same iTunes password for apps/content etc.
Here is more info:
Sign in ...
See more...
It is possible to have a separate iTunes / iCloud password. I know people who don't use Family Sharing but share the same iTunes password for apps/content etc.
Here is more info:
Sign in with your Apple ID on a new device - Apple Support
Use different Apple IDs for iCloud and iTunes
We recommend that you use the same Apple ID for all Apple services on your device—including the iTunes & App Stores and iCloud. Using multiple Apple IDs might be confusing and cause issues with accessing purchased content or using some services. If you have multiple Apple IDs, you can’t merge them.
But if you already have different Apple IDs that you want to use with iCloud and the iTunes & App Stores, you can still get all the benefits your Apple ID has to offer.
On your iPhone, iPad, or iPod touch, go to Settings > iCloud and sign in with the Apple ID that you want to use with iCloud. Go back to Settings > iTunes & App Stores and sign in with the Apple ID that you want to use with iTunes.
On your Mac, go to System Preferences > iCloud and sign in with the Apple ID that you want to use with iCloud. Go to iTunes > Sign In and sign in with the Apple ID that you want to use with iTunes.
If you use multiple Apple IDs and want to restore your device from a backup, you can learn more about iCloud or iTunes backups.