Not for the average/casual user, which is why this post exists.
The average person will look at that and see the ‘!’ in a triangle and became scared of what it can do to their system, even though it has no more permissions than a system package. Alternatively, they will become desensitized and learn to ignore it, resulting in installing flatpacks from untrusted and unverified sources.
Overall, I just think the idea around having to sandbox all flatpaks is not a good idea. To give a concrete example, Librewolf is marked as “potentially unsafe” because it has access to the download folder, but if I want to use it to open a file that isn’t in “downloads” I have to use flatseal to give it extra permissions - it’s the worst of both worlds! Trying so hard to comply with flatpak guidelines that it gets in the way of doing things, and still not being considered safe enough.