A contrast in Detroit women circa early 1900s

I was browsing through online photograph archives of old photographs from Detroit and came across these two contrasting images of women in Detroit from a relatively similar time period of the early 1900s.

These hard working ladies are shown in the welding department of the Lincoln Motor Company around 1914-1918. Obviously, this was during World War I and women were needed to work the factories in the absence of men.

Here we have a group of women enjoying a leisurely time on the veranda of the Detroit Boat Club between 1900 and 1910. Were any of these ladies thrust into service at the factories like those above? Or did a life of privilege exclude them from such duty?

I just wonder these things when looking at old photographs.