How can it not be true though? Terminal shines when you chain together more than one operation.
Imagine doing this in a GUI: list the files in a large directory, ignore the ones with underscores in them, find the biggest file, read the last 1000 lines from it and count the number of lines containing a particular string.
Thats a couple of pretty straightforward commands in a terminal, could take 30s for an experienced terminal user. Or the same task could take many minutes of manual effort stuffing round with multiple GUI applications.
I’m certain that I do tasks like that (ad hoc ones, not worth writing dedicated software for) tens of times in a typical work day. And I have no idea how GUI users can be even remotely productive.
The ‘all’ in your comment makes this incredibly easy to refute. I am a Christian and I believe sexism, racism, slavery and genocide are all deal breakers. Frankly I’m not sure if you’ve met any actual Christians.
The Bible makes it really clear that not everyone who calls themselves a Christian should be considered one. Have a look at Matthew 7:1-5 and also especially verse 21:
“Not everyone who says to me, ‘Lord, Lord,’ will enter the kingdom of heaven, but only the one who does the will of my Father who is in heaven.”
Lots of modern ‘Christians’ may have never considered that that verse might apply to them.