As a leader, you don't always need a reason to do something, especially if the reason is relationship building.
Go with your team to do something even if it's not needed. Turn a 1 person job into a 2 person job.
It's also a difficult balance between inviting someone to do something with you for the relationship building but stepping out of things when you should to delegate. Not fully sure when you know when to do either yet.
Maybe the takeaway is, relationship building can be reason enough.
Reminds me of my boss saying that when you're giving a sermon or talk, never tell your audience that you're skipping ahead or you skipped some parts.
They don't know.
Don't pull back the curtain if you don't have to.