That's 30 years of using closed source software from strangers
...ok?
Or do you have many good friends at Redmond WA USA ?) :-)
I don't understand.
Maybe decades ago it was.
No it still is. Look up any software for Linux. There will be links to download the software for Android, iOS, Windows, MacOS and if there is a Linux version it will just put the command and not even explain what it is or what to do with it, because they just assume if you're using Linux that you're familiar with the terminal.
Do a web search for "how to <anything> in Linux" and tell me it doesn't send you into the terminal to do it.