That's shitty too but it goes back to poor communication crap.
IMO knowing when to use an email, talking in person or phone, or IMing is a balance many just simply don't get.
At least if I need to call I always IM the person and say "hey can you talk" "or give me a call when you have time" if it's important but not urgent.
Like people who don't look at your status on teams and IM you when you're presenting or in a meeting and apparently oblivious to the fact you're presenting/busy, and need you to drop your crap to come help them. Like, take a sec and determine if that person can even talk to you. Younger people at my job at THE WORST at that.
I guess the email thing is more hot in my mind because one of the young engineers for my main client is horrible at this. His emails are mini-dissertations that often don't have a point or the point gets lost in a lot of words (also, real giant pet peeve, he never addresses anyone in his email, he just starts off with "Hello" and then goes into it, as if I or anyone else in the email aren't worth even mentioning, it's so goddamn impersonal). If he just emailed or IM'd us and would be like "hey, I'm not fully understanding this or would like to talk about this, can we set up a time to discuss" it'd solve so many problems but instead he just hides behind his keyboard, and we're left trying to actually figure out what he's trying to get.
It's about knowing what is best way to communicate and when to use each one of them.