Can't argue that championship courses are okay as they are. But others ....
My not very big city lost a golf course this year. The third in 30 years. This one was a lighted 9 hole short course, so distance pressures were hardly relevant. But if they had pushed playing a shorter ball as an option, who knows, they might still be in business. Given the right ball, a 9 hole short course can play like Firestone, and much faster. Faster because of not only shorter walking/cart distances but fewer lost balls to look for and less errant shots. And for evening hours, why not a glow-in-the-dark ball that doesn't fly far?
Golf courses are threatened by urbanization, gentrification, sky-high real estate prices, taxation, wages and cost of employees, and declining participation in golf. Is golf going the way of bowling? Will it become again a game only for the wealthy elite?
Which adaptation to combat the hemorrhage most harms traditional golf, a shorter ball and more shortened courses -- or garbage can-size holes in the green?
And remember, this is not either-or, but introducing more choices in how people play at average golf courses.