As a manufacturer, trying to capitalise on revenue income, why wouldn’t you have something in your line to sell to the ladies (mostly)?
Not everyone with the financial means is remotely interested in horology – quite often it’ll be more about cachet and looks, and inclusion within their social group.
Plastic isn’t wrong, in fact it’ll be a necessity due to the fact it is electrically non-conductive, thereby preventing a short-circuit with the case.