How is this any different from the federal reserve printing off money when ever a crisis arises? In seeking to preserve the core values of BTC this fork is doing the opposite by shattering the virtue of a capped supply and doubling it over night.
The key difference is that when the Federal Reserve prints dollars, existing holders don't automatically receive extra dollars. All else equal, such a maneuver reduces the purchasing power of each dollar, and therefore, the stored wealth of each holder of dollars.
For the Bitcoin hardfork, while both BCH and BTC will have less value than the bitcoins we have today, every bitcoin holder will automatically have the same amount of BCH and of BTC after the fork and so will maintain their purchasing power.