Implications of the statement: "Note that it is very difficult to remove Rosetta 2 once it is installed"

When attempting to install an app built for Intel Macs on an Apple Silicon Mac, I encounter the following message: > Note that it is very difficult to remove Rosetta 2 once it is installed What does this statement mean from a technical standpoint? Specifically, what changes occur when installing Rosetta 2 on an Apple Silicon Mac, and what technical reasons make these changes difficult to reverse?