That is for you to assess. macOS gives you the opportunity to either override the security popup by right-clicking the app and launching it anyway, or not. Als

That is for you to assess. macOS gives you the opportunity to either override the security popup by right-clicking the app and launching it anyway, or not. Also, the "security risk" doesn't get a whole lot smaller when the app is signed. Only widely known malware apps will get their certificates revoked in time. The new "notarization" is slightly more thorough but the risk is still up to you and the app permissions for non-appstore non-sandboxed apps are indeed quite open. Malicious or not, an app that is not sandboxed can steal or damage your data anywhere in the filesystem. So again - all up to you to decide.