My dad was born in 1902. He never went to work without a hat, long sleeves, long pants and in Kentucky where we lived he wore high top shoes or boots to keep the copper heads from getting him.For some strange reason my family has been spared skin cancer. Lots of redheads, blondes and many born and raised in Florida but never skin cancer.
My grandfather was a citrus grower and in the sun constantly. But he dressed for it. He wore a heavy cotton long sleeve shirt and wore a straw cowboy hat. He always wore long pants. He said if you run around in the sun without covering your body you were asking for a painful slow death because this Florida sun will eat you alive.
My grandmother was old school too and she dressed in long dresses that had long sleeves. When she went out she would put on a white pair of ladies gloves. It was just different back then. The old timers went to the beach dressed like that.
I think there is something to this because I have seen skin cancer and one person was a co-worker. She was a beauty and loved the beach. She played beach volleyball and worshipped the sun.She was pure blonde, had fair skin and her ancestry was from Scandinavia. At the age of 55 she got melanoma and it was all down hill from there. She had one of the most painful deaths one could imagine and at the end she was going blind. Cancer spread all over her body but she was strong from being very athletic and fought it off until the end. But it got her.
19th Century styled farmers knew the environment that they worked in and took care of themselves.
The only time dad would consider wearing a short sleeved shirt was at home, inside the house.