Chairlifts without footrests in USA

I grew up in Sweden. Like most other nations with developed lift infrastructure, our chairlifts have footrests. I have been skiing in a few places in western USA since I moved here (Heavenly, Kirkwood, Palisades, Brian Head, Sun Valley), and I have yet to experience a single chairlift with footrests. Is this commonplace in the US? Or have I just been to a minority of areas that do not have them? And more importantly, why in the year of our lord 2025 are we made to dangle our skis like that