Is secureblue really more secure if browsers have to be installed in flatpaks?

Pioneer:

TBH the more I read the more confused I am by their attitude, because if you want a secure system but don’t care about open source or privacy then why not use a mac?

Secureblue is for people who want to use Linux as a first priority and want it to be secure as a second priority.

secureblue

Who is secureblue for? - secureblue: A security-focused desktop and server Linux...

secureblue is a security-focused desktop and server Linux operating system, developed as an open-source project. It is shipped as a set of OCI bootable container images, which are generated with BlueBuild, using Fedora Atomic Desktop’s base images as...