Yep you can drag a file onto the doc on an app icon to have the app in question open the file (assuming it was meant to run that file).

I gotta say, I'm not a Windows user anymore, but it would drive me nuts if I couldn't do that.

Finder (the MacOS version of File Explorer on Windows) is an app you commonly interact with every day for several minutes. If it doesn't work well that's hours of your life you spend fighting the system instead of getting things done.

Those are the kinds of things that made me move away from Windows 10 years ago.