If anything 60hz monitors benefit far more. Variable refreshes becomes a nonissue if your refresh rate is high enough that just waiting for the next frame isn’t too long. The case that benefits the most is when a game is running just below 60 fps on a 60hz screen and missing frames regularly, causing lots of stutter where it has to wait for 16ms. It’s a much smaller issue at 144hz since a delay of 7ms is relatively subtle.