Yeah, I don't think so. I am running a handful of apps classified as Intel-Only Apps, and even when I start up another Intel-Only app, there is nothing that opens up at the same time, and certainly nothing that takes up a significant amount of RAM on my Mac Studio.
At any moment in time, I have a handful of Intel apps running, like LogiTune, AJAAgent, and Divvy, and even when I start up like Adobe Animate 2022, nothing out of the ordinary starts up as well. So, I don't know how you can say that Rosetta consumes 3GB if RAM - it doesn't on my system.