Sending a mix stream without adding system latency?

There’s latency and then there’s latency. If I use a third party program like OBS Studio (Freeware), I can stream an input to a streaming service in the background. This, without affecting the latency in Cubase. Surely there will be an considerable amount of latency for the person that taps in to the live mix. But since there is no need to two way connection, this latency is unimportant. So, why can’t an advanced program like VST Connect achieve this, or am I missing something? I am looking for a one-way connection so that anyone can listen in to my live mix without affecting the “working latency” in Cubase. Studio Pass claims to let customer do just that, but the working latency will be unacceptable.

I hope my english is good enough to explain what I am looking for. Thanks

/M