I'm with you, if what you're saying is that containerized applications are a cop-out. On the other hand, they have their uses. For example Valve seems to have a hard time packaging Steam (being a weird 32bit web browser with DRM), but the flatpak (produced independently) works nicely, and because it's closed source it's your best option.

(Also I think it's too kind to include Snap with the others, I find it uniquely objectionable since it's neither convenient nor functional.)

edit: clarify that the Steam flatpak is not made by Valve