Are parties necessary?

It's okay if you don't have friends! If you want, I can immediately throw a super lively party for you! Isn't that right? As long as I'm here, I'll never let you feel lonely!

The main story seems like it's going to be expanded. There's a main quest later on to add friends, so it'll be convenient to just poke the party creator then (#

Unnecessary

It just brought in a little extra income. There's not much interaction required after joining, and you just claim it once a week.

The gems are so few I almost ignore them lol Whether to add them or not is up to personal preference.

Not many gems.

It's unnecessary. Don't worry about it.

Not necessary, the diamond income per week is pitifully small.

Queue up for extra weekly gems, join cautiously as needed

Add a feature to compete with party members on playtime and get weekly gems, though it's probably useless.