Don't try to make sense of something that is completely arbitrary, without any basis in data or logic. Still no golf in Maryland. But in my neck of the woods, there is a 7-mile shared use trail, asphalt ten feet wide. Full every day from dawn to dusk with walkers, runners and bikers. Traveling at different rates of speed and every time they pass one another in the same direction they're within 6 feet. Also passing within 6 feet in opposite directions if folks are two abreast. And we can't play golf (as singles, twosomes or foursomes) on 100+acre courses? Makes zero sense.
Meanwhile, landscaping and construction are "essential." Around here I see mostly Hispanic guys crammed 3 and 4 at a time into the cabs of the pickups, and I wonder what kind of government thinking values their health so lightly and the landscaping of the Chevy Chase elite so highly.