I understand that BSD see closed source as something cool

‘You understand’? Where did you get that idea?

The argument is not, and was never, that closed source is cool. The argument is that strong copyleft, while based on a noble goal, ends up hindering development: Here’s OpenBSD’s take on it. (CTRL+F for GPL).

I know at least two people who have been using Ubuntu as a daily driver for years and have never (as in, ever) touched the terminal.