I'm curious why you are nervous to install software on OSX? Mac installers should generate a log of everything that has been placed/modified on your computer.
This particular installer is a .app rather than a .pkg. I don't think there's anything that would make a .app log all of its changes.
Bad experiences in the past of having to remove many different files from different places.
There are apps that do that now, AppZapper, etc.
I wish I didn't have to pay for another app to uninstall other apps :/
There are free ones too?
Windows and Unix have the same issues with little pieces of apps being everywhere.