Pioneering requires long hours. Sisters tend to wear long skirts as they are easier to climb in and out of vans and cars. You also dont have to wear leg wear (stockings or hose) or have nice legs to wear a long skirt. Heck, you dont even have to shave your legs if you are not of a mind to. Who will know? So this quickly became a standard of dress for housewives in the 30 and 40 yr old range. They were homeschooling the future Bethelites, and C.O.s and pioneering while they did it!
I Remember back on the day (90's) Long skirts were very fashionable. You would think that would make the elders happy, but no. Because it was hot in the summer (inland California) with at least thirty days a year of temps over 100 degrees ( Fahrenheit. For you Brits, in Celsius it would be f'ing hot). Most women gladly shed their pantyhose, and why not, no one could see your legs. The elders dictated that going bare legged was not appropriate for meetings or service. Also, denim skirts and dresses were not appropriate either. I seriously considered this counsel and decided to give up.... field service.
When long skirts went out of style I gladly gave the up, frankly they were not all that flattering, especially my short curvy figure, but I never went back to pantyhose.