This is not true, they account for only 0.5% of daily water usage by most estimates, most of which is, in turn irrigation-designated water, (which is not drinking quality). Agriculture remains by far the largest consumptive source. I don't know where you're getting this "14%" figure, it could be a misunderstanding of domestic and recreational water use (~10% of water use) of which around ~5% is irrigation for golf courses, and then adding the units together as if the 5% is percentage points rather than a percentage of a percentage?
Survey of Water Use and Management Practices on US Golf Courses from 2005 to 2024 in: HortTechnology Volume 35: Issue 5 | ASHS
This statement also overlooks that golf courses in wet regions with relatively cheap water (like the US Northeast and Northcentral areas) tend to be the ones using the most water, so some portion of that water use is not seriously competing with anyone for water.
Golf courses in arid regions though probably should be restricted, they are not a big driver of economic activity relative to their costs (though they are relatively good at extracting money from the wealthy to put back into the economy, they are not quite as good at that as various other luxury goods and services which are cheaper to produce)
