I walk on eggshells, here.
There are benefits to using Flatpak or Snap on occasion. These benefits are enough to convince the ZorinGroup (ease of use, less dependency errors) that they are viable.
As I outlined above, I disagree. But to every two sides are... two sides. I want to remain fair and provide all sides - you can make your own decisions.
I just prefer that users have an informed decision.
.deb is the packaging system used by all Debian based systems, including Ubuntu and Zorin OS.
I would say that these are User Prefernce, not OS preference. The .tar.gz files need only be extracted, then three commands issued to install.
As you ask, a .deb package on Zorin OS only needs to be double-clicked to install. As you see here, same results, different method. I can use either just as easily as the other. You may prefer a double click approach as easier.
But being versatile and able to handle either method is really the best way to go, even if you lean toward the double click method - when you run into a package that can only be installed from source- you know how.
I think that one of the biggest problems in Linux for installing packages is that the many methods also allows for confusion. Let's say you look up an installation guide on a certain package and that guide is outdated. That your system has different dependencies (Different common libraries used to run an application). You may not realize this and so you may get tangled up in trying to meet the dependencies instead of choosing a different installation method. People generally try to stick with what they know. After using Linux for a while, this becomes easier with experience. But for starting out, it can be a sticky web.
These- are your intros. It will get easier... But as it is for now, if you find yourself stuck or something doesn't make sense; We Are Here. Ask (as you have been). Don't let yourself fall down the rabbit-hole of chasing dependencies when... There's probably better way.