Because putting through old tires and gutter pipes is more ladylike than playing actual golf.
Sources:
“10 Things You Didn’t Know About Mini Golf.” Main Event, https://www.mainevent.com/stories/10-mini-golf-facts/.
Bush, Hamilton. “The History of Mini Golf in the Scenic City.” Choose Chattanooga, 14 January 2021, https://choosechatt.com/blog/mini-golf-in-the-scenic-city/.
“Business: Tom Thumb from Tennessee.” Time, 14 July 1930, https://time.com/archive/6745353/business-tom-thumb-from-tennessee/.
Eschner, Kat. “The Brief 1930s Craze for 'Tom Thumb Golf.'” Smithsonian Magazine, 9 February 2017, https://www.smithsonianmag.com/smart-news/american-inventor-mini-golf-called-it-tom-thumb-golf-180962026/.
“The History of Miniature Golf.” Lumberjack Pass Miniature Golf, https://www.lumberjackminigolf.com/history-of-mini-golf.
“History of Tom Thumb Mini Golf.” Fort Edmonton Foundation, 2 August 2023, https://supportfortedmonton.com/history-of-tom-thumb-mini-golf/.
Phipps, Sean. “The 'Fun Version' of Mini-Golf was Invented in Chattanooga, T.N.” Nooga Today, 11 June 2019, https://noogatoday.6amcity.com/mini-golf-chattanooga-history.
“The Zany History of Mini Golf.” Mental Floss, 12 July 2023, https://www.mentalfloss.com/article/19567/zany-history-mini-golf.