There are places in the US where extensive turnout is not feasible due to lack of land. And grass turnout is prohibitive due to limited water (rain and irrigation). Any boarding stable I’ve been at (ridden at or had a horse at) horses either got turned out by their owners while they were on the property or by barn workers on a pretty rigid schedule. You do have to be diligent about getting horses out every day.
Having seen what I think was the original post that prompted Dani’s response, IMHO it would have been more appropriate to suggest appropriate leg protection to use rather than to suggest avoiding the problem by not turning out.