Secure can also mean more resilient. The infosec C-I-A triangle has three legs. Confidentiality, Integrity and Availability. Immutable distros are more resilient and thus offer better availability in the face of attacks or accidents.

Awk is a turing complete programming language.

A VPN transfers trust from the ISP to a VPN provider

Encrypted DNS does not stop ISPs from seeing the ip addresses of the websites you visit

For anonymity use TOR