Well, a gate that opens with a swing is generally known as a swing gate. Swing gates for pedestrians are just about everywhere, and commonly available as ‘pedestrian swing gates’. I think OSM has, once again, used a generic term to indicate a more specific type, thereby excluding other specific types.
There is little support to adapt, so be it.
We may come up with a subtag to specify a gate as a pedestrian (swing) gate. We, that is interested mappers in the Dutch community. Currently, a suggestion is to add a note or a description with the word “klaphekje” in it, which is Dutch for small self-closing pedestrian swing gate, but I would prefer an English term, e.g. gate=self_closing_pedestrian_gate. Or use self_closing=yes, which could be used for other gate types as well.
PS My personal favourite gate type is the “Twents hek”, that is the traditional gate to meadows and farmland in the Twente region in Nederland, still to be found in many places.
In essence it’s a sizeable tree branch with one pivot point on top of a sturdy pole (or a tree stump), where the thick end serves as a counterweight for the longer and thinner end. The catch pole just holds the tip of the beam. Usually, before opening, a weight such as a sack of grain was hung on the thick end to ease the opening and swinging movement, and there was a second catch pole for the open position.
The big advantage of this type of gate was: All you needed was one thick iron pin for the pivot. The rest is wood, found in the vicinity. The pivot pole could be a conveniently placed tree stump, and the tip could rest against another tree, on a branch.
I often try to open these gates to test the balance, but most of the time I can’t lift it without my wife sitting.hanging on the thick end. Luckily, so far we haven’t been caught in the act.