The average golf course in Arizona uses 450,000 gallons a day according to [1]. According to [2], this means we're talking about 4-8 golf courses per day. There are over 200 golf courses near Phoenix, so your concern is legitimate the water usage here is marginal relative to the economic impact. As other commenters have pointed out, if you really want to impact water issues, there are far more efficient ways to tackle them.

[1] https://www.azcentral.com/story/news/local/arizona-environme...

[2] https://www.reliableplant.com/Read/25055/Ultrapure-water-sem...