I find the authors concerns about security to be at odds with their enthusiasm for flatpak and systemd. Personally I don’t think containerised applications get as much attention from package maintainers or security audits. Systemd is also expanding into every area of the OS including recently offering a sudo alternative which is basically creating one massive attack surface.
I’m a millenial but one of my most conservative friends has parents who are total left wing hippies. Sometimes kids end up rebelling or defining themselves in opposition to certain aspects of their family members.