In my opinion this is an incredibly unfriendly and immature thing to say. The count of people it happens to is irrelevant. It happened to one person. "No one else had that problem" is not inclusive. I cannot imagine a good intent. If the story is accurate, this is shameful behavior on RC's part. I would like to hear a response from someone over there
The author even admits that RC put the event on his calendar, but he simply ignored it because it was at 7:15AM:
> It was on the calendar, but at 7:15am in my local time zone, so by merit of that alone I had simply ignored the event
The author also admits that RC tried to contact him as soon as they noticed he wasn't in the meeting, but he also missed that communication.
> Hi Erik! I sent you an email this morning, but never heard back – we didn’t see you during the welcome flow or talks this morning, and we wanted to check in to see what happened.
It wasn't until the afternoon and a second e-mail that the OP started communicating with them about the issue.