It's another of those phenomena isn't it, where an upper-class marker disseminates into the working classes then disappears, becoming unfashionable.
All Victorian and Edwardian 'ladies' wore gloves outdoors, and white gloves showed you didn't do dirty work therefore were a cut above. Once Europe had stopped ripping itself apart with wars and the economy began to settle down, working people began to have more cash to spend on desirable consumer goods and fashions.....including little white gloves to show you were a proper lady.
On a practical level, before car ownership was common it made sense to wear gloves cos it got very cold waiting for buses. It was also handy to put your bus fare, then your bus ticket, inside your glove so you didn't have to root in your handbag in the dark.
On 'walking days' ie around Whit Sunday the girls walking outfits always included a completely unpractical pair of little frilly gloves, worn only for church thereafter.
Go -on - who remembers Market Street in Manchester on Whit Sunday?