It is reasonable to assume that a verified Flatpak will have a lower chance of containing malware, since initial verification includes manual review (by a Flathub maintainer), and certain changes (like default permissions) also require manual review.
So the way I see it, it does help, but not in a meaningful way.
That’s my point, it does not “help” preventing from malware from being downloaded.
It is reasonable to assume that a verified Flatpak will have a lower chance of containing malware, since initial verification includes manual review (by a Flathub maintainer), and certain changes (like default permissions) also require manual review.
So the way I see it, it does help, but not in a meaningful way.