I don't agree that it's useless either, but I would expect the test macro to match what I do while working: Opening multiple PRs in new tabs all the time, cloud vendor portal tabs, looking through logs and metrics, scrolling (more than watching) some YT video, lots of scrolling and switching of the 15 open tabs, navigating enterprise software portals that are badly written web apps (looking at you, Salesforce)... this is a normal workflow for me and I feel that it questions the crazy in the crazy macro. It also questions the sanity in me, but that's beside the point.

Having a good amount of background processes running (terminal stuff, IDE, Slack, Google Drive, OneDrive, VPN etc. is probably hard to test without introducing more variance, but I can imagine they could play a part. Especially on an 8 GB unified memory MacBook.