

Phishing actually is a core branch of hacking—specifically under Social Engineering. It’s not really like walking through an unlocked door; it’s more like a con artist dressing up as a locksmith and convincing the homeowner to hand over the keys.
Hacking applies to the entire attack surface, which includes the human element, further more there are whole phishing campaigns that are heavily automated and often deliver stealer malware, making them a full cyber attack.
This wasn’t a technical compromise of Signal itself, but phishing/social engineering is still a form of hacking.





You don’t necessarily need QubesOS to get better isolation. You can package unsupported applications as Flatpaks yourself and run them with minimal permissions. The downside is the maintenance burden, and Flatpak sandboxing isn’t as strong as Qubes’ VM-based isolation. It’s a useful middle ground, but it doesn’t completely solve supply-chain risk. Qubes can be good, but it’s all about your friction budget.
Humans optimise for convenience eventually.