That got added recently, but you still need a phone number to sign up. A phone number is tied to your identity, meaning that signal’s database has the names and addresses of everyone who uses it. And since signal is US-based, its subject to US national security letters, meaning its illegal for signal to tell anyone that the US government has requested information about who they’re talking to.
Under the Obama administration, an average of 60 NSLs were issued every single day.
A million Iraqi civilians died in the US wars on Iraq. They carpet bombed and let so many cities just burn.