You're absolutely right!

I have a friend that has used ems all his professional life and is livid that they're now a telltale for AI. So yeah, false positives.

Include the Gen Xers who read The Mac Is Not A Typewriter in the 90s or were merely into fonts.

Heck, anyone used to a word processor that automatically changes dash dash into em-dash.

There’s a lot of us that knew how to use em-dash.

Its not just a telltale sign. Its a fact.