Yeah, this is a consequence of limited resources. In an ideal world, the good guys would have resources for all the things, I guess.

Literally nothing is preventing you from creating your own secure Linux installation on any hardware you've got.

Besides ones technical skills. Not all activists are knowledgeable enough to just roll their own distro.

Beyond that, I thought it was now well understood that rolling ones own security software is a terrible idea. Many eyeballs etc. Activists with the technical skills /should not/ roll their own, they should definitely contribute to existing projects.