As an Australian who lived in America for 5 years - it’s bonkers to claim the service is better (or even as good) in Aus. It’s clearly more attentive in the states, anyone who says otherwise has an agenda.
Sometimes you don’t want good service - as in, you don’t want a server to talk to you. That’s a lot easier to find here.
Yeah, this exactly matches my experience visiting Sydney from the US, it was great. I'm not antisocial, in fact I enjoy talking to strangers, but it feels very wrong to pay them for it.
As an American, having traveled in Europe a few times and dined out a lot, I much prefer the culture of just leaving me alone and letting me signal the waiter to come over when I need something.
Or they may have different values to you. I find American style surveillance services and false smiles pushing upsells to be the worst restaurant experience globally. I'd take any abrupt waiter over that.