Here's a recent conversation I had with a friend:
Me: "I wish I had more friends. You guys are great, but I only get to hang out with you like once or twice a week. It's painful being holed up in my house the entire rest of the time."
Friend: "You know ${X}. You could talk to him."
Me: "I haven't talked to ${X} since 2019."
Friend: "Why does that matter? Just call him."
Me: "What do you mean 'just call him'? I can't do that."
Friend: "Yes you can"
Me:
Later: I call ${X}, we talk for an hour and a half, and we meet up that week.
This required zero pretext. I just dialed the phone number and then said something like "Hey ${X}, how you doing? Wanted to talk to you, it's been a while." It turns out this is a perfectly valid reason to phone someone, and most people are happy to learn that you have remembered or thought about them at all.
Further, I realized upon reflection that the degrees of the people I know seem related to their inclination to do things like this.
You seem to be operating on a model that says “either something is obvious to a person, or it’s useful to remind them of it, but not both”, whereas I personally find it useful to be reminded of things that I consider obvious, and I think many others do too. Perhaps you don’t, but could it be the case that you’re underestimating the extent to which it applies to you too?
I think one way to understand it is to disambiguate ‘obvious’ a bit and distinguish what someone knows from what’s salient to them.
If someone reminds me that sleep is important and I thank them for it, you could say “I’m surprised you didn’t know that already,” but of course I did know it already - it just hadn’t been salient enough to me to have as much impact on my decision-making as I’d like it to.
I think this post is basically saying: hey, here’s a thing that might not be as salient to you as it should be.
Maybe everything is always about the right amount of salient to you already! If so you are fortunate.