People who say "first time" in new content

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People do this on the first day.

Well yeah, I personally do all the new stuff every time maintenance ends, so I'm no stranger to that.

I'm not a sprout, The Rising technically also celebrates when I started playing. As with a lot of vet players I've sorta dialled back the hardcore playstyle and often it's weeks or even months before I get to "current" content (minus crafting, that some day one sh!t for me) so I like to throw it out there in case the Tank (I'm a healer main) missed the chat log notice. It's usually well received, but I've also had Tanks drop party because of it. This community is usually pretty OK but there are some standout exceptions in regards to douchebaggery...

I'm not talking about weeks or months into content, I'm talking about when it's completely fresh and new.
I don't really mind when people say first time a month or so after it's out, it's when it's not even been a week yet that confuses me.